Definition of variable in English:

variable

adjective ˈvɛːrɪəb(ə)lˈvɛriəb(ə)l

1Not consistent or having a fixed pattern; liable to change.
易变的，多变的，反复无定的
the quality of hospital food is highly variable
医院的食物质量非常变化不定。
awards can be for variable amounts
奖金数量可以很不一样。
Example sentencesExamples
- Staffing is adequate in numbers but variable in quality.
- The menopause is an event that tends to be highly variable in timing and pattern.
- The contractor was subject to a yearly rental, composed of a fixed amount plus a variable amount that depended on yearly profits.
- Local weather patterns are highly variable, and only long-term changes in averages have any significance.
- The cyclical nature of our weather changes point to the variables in our solar system and even galactic variations.
- All eligible members will get a fixed allocation of 185 shares and a variable amount based on the length of time they have held their policies and the sum invested.
- York's already variable air quality is set to worsen to the point that the city is penalised by the Government.
- In the southern and central parts, weather is more variable from October to April than in the north.
- There are two types of interest rate to choose from, i.e.: fixed interest rates and variable interest rates.
- Ulster Bank will also offer both fixed and variable rate deposit accounts.
- Chapter introductions contain inconsistent bits of information and are highly variable in their length and information content.
- Where pertinent, costs will be divided into fixed and variable components to help better determine which option is more economical.
- However, as is typical for desert regions, the amount and distribution of yearly rainfall are highly variable.
- Financial reporting patterns were variable both across companies and over time.
- The multiple signs and symptoms of intoxication and withdrawal often are not consistent because of variable dosages and the adulteration of drugs.
- Very roughly speaking, this process divides expected expenses into fixed and variable components and develops a budget estimate for each.
- Canyonlands' climate is extreme and highly variable - temperatures may fluctuate as much as 40 degrees in a single day.
- Moreover, rainfall is highly variable, and the start and end of the two rainy seasons are unreliable.
- Even the music, which, whilst variable in quality, has some genuinely affecting moments, ultimately seems insubstantial.
- Make a chart and list all your fixed and variable expenses, down to your weekly lottery ticket purchases.
- Second, real economic conditions within Europe are likely to be more variable and volatile.
Synonyms
changeable, changing, varying, shifting, fluctuating, irregular, wavering, vacillating, inconstant, inconsistent, fluid, floating, unsteady, uneven, unstable, unsettled, movable, mutable, protean, chameleonic, unfixed, fitful, capricious, temperamental, fickle, kaleidoscopic, volatile, unpredictable, undependable, unreliable
1. 1.1 (of a wind) tending to change direction.
  （风）方向不定的
  winds will be light and variable
  Example sentencesExamples
  Winds will be light and variable and the nights will be misty, with fog patches.
  On another day, light and variable winds, combined with strong tides, affected competition.
  In their quest to achieve good results, competitors faced the challenges of not only the large number of boats, but strong tides and variable wind conditions.
  The wind was quite variable during the course of the day, with a 20 km easterly tailwind at the start, turning southerly and reducing as the day progressed.
  The ground level winds were variable, but mostly coming from the north.
  The weather was scattered low clouds, light and variable winds, with thunderstorms in the area.
  The variable winds and mild weather last Saturday was perfect for the start of the second round of yacht racing off the shores of Ocean Marina.
  The isobars are more or less concentric and are widely spaced around the centre of the high and thus, in contrast to depressions, winds are usually light and sometimes rather variable.
  Synonyms
  changeable, changing, varying, shifting, fluctuating, irregular, wavering, vacillating, inconstant, inconsistent, fluid, floating, unsteady, uneven, unstable, unsettled, movable, mutable, protean, chameleonic, unfixed, fitful, capricious, temperamental, fickle, kaleidoscopic, volatile, unpredictable, undependable, unreliable
2. 1.2Mathematics (of a quantity) able to assume different numerical values.
  〔数〕（数字）变量的
  Example sentencesExamples
  In particular he published a paper on the Cauchy problem for equations with variable coefficients in 1956.
  As gene diversity is a continuous variable, the expected value of the parameter was calculated using a sliding window of 0.0125.
  He replaced the differential operator d/dx by a variable p transforming a differential equation into an algebraic equation.
  By examining the limits of sums, products and quotients of variable quantities, Mengoli was setting up the basic rules if the calculus thirty years before Newton and Leibniz.
  Brown's formulae involved some 1,650 trigonometric terms, many of them with variable coefficients.
  He extended the applications of the operational method to linear ordinary differential equations with variable coefficients.
3. 1.3Zoology Botany (of a species) liable to deviate from the typical colour or form, or to occur in different colours or forms.
  〔植，动〕变异的；变型的；多变的
  Example sentencesExamples
  For example, all specimens assigned to the Incertae familiae, discussed below, were treated as members of one highly variable species.
  In each of these studies the material assigned to Dellea was interpreted as representing one long-ranging and rather highly variable species.
  The species is morphologically variable and exhibits more molecular variation than A. hypogaea.
  Barycrinus rhombiferis is also the most morphologically variable species of Barycrinus, possessing a wide array of polymorphic characters.
  The Canada Goose is a highly variable species which has long caused headaches for taxonomists.
  Although its resemblance to T. sowerbyi is not particularly close, it falls within the morphologic range of this very variable species.
2Able to be changed or adapted.
可变的；可更改的
the drill has variable speed
这个钻机有可变速度。
Example sentencesExamples
- Efficient motors, variable speed drives and economizer cycles all can be used to minimize energy consumption.
- Newer, quieter fan motors with variable speed drives allow a larger box to be selected at a lower fan speed, reducing noise.
- As an example, we like to think of the English language as infinitely variable and rich.
- Natural-gas-fired absorption chillers and variable speed pumps, motors and fans increase the efficiency of the cooling and heating system.
- The variable design allows buyers to choose between a layout of four bedrooms and one reception room or three bedrooms and two reception rooms.
- Unlike any other tape drive, VXA can operate at variable speed.
- A drill with variable speeds is crucial; if you don't own one, buy one - it's a must-have tool.
- The university was able to upgrade all of its chillers to high-efficiency units and install variable speed pumping units.
- All centrifuges have the capability to tilt at various angles and spin at infinitely variable speeds.
- Temperature is variable from 0° to 210° Celsius and the unit can produce cold water, hot water and wet or dry steam.
- The arrows are metal-tipped and made of carbon, with a shaft diameter of up to 9.3mm and of a variable length depending on the archer.
- The heatsink fan operates with variable speed.
- ‘When you are operating a motor with variable speed you have more flexibility,’ he says.
- The horsepower varies from 140 to 180, and variable horsepower is available on all models.
- Yet sales of variable speed motors make up a small share of the market.
- An infinitely variable camshaft timing device has a control valve located in the rotor.
- It also includes a variable temperature control panel and a 30-minute timer that should minimise the risk of over and undercooking.
1. 2.1 (of a gear) designed to give varying ratios or speeds.
  （齿轮）变速的
  Example sentencesExamples
  The invention of variable gearing enabled bicyclists and cars alike to change the speed of peak efficiency.
  The CVT in the car's name stands for continuously variable transmission.
  Thanks to a continuously variable transmission, throttle response is very linear as gear ratios are always optimized for the available engine power and road conditions.
  Japan's leading maker of continuously variable transmissions is gearing up for a big increase in sales over the next five years.
  In addition to a standard five-speed manual transmission, there is a new five speed automatic and a continuously variable transmission.

noun ˈvɛːrɪəb(ə)lˈvɛriəb(ə)l

1An element, feature, or factor that is liable to vary or change.
可变性；可变因素
there are too many variables involved to make any meaningful predictions
涉及的可变因素太多，不可能作有意义的预言。
Example sentencesExamples
- There are so many other variables involved that it is impossible to know.
- ‘Some no doubt merit a prison sentence, but there are a whole range of significant variables involved,’ he explained.
- Luck is the one thing clubs can't factor into their timing; the one variable that can throw out the whole plan for success if a key player is put out for the rest of the year.
- One of the most important variables is the timing of the beginning of the wet season.
- There is almost a nightmare element to the many variables that are coming together at one point in time.
- It is the interaction of these variables and other modifying variables, such as demographics, that allow for the prediction of health behaviors.
- Understand that in college admissions, grades are only one of the many variables that are factored into the selection process.
- Climate-change forecasts… are like financial forecasts but involve a vastly more complex array of variables.
- The test requires a number of independent observations of the same variable over a period of time.
- Ball trajectory into a bunker can determine the outcome of a lie in a bunker, and this factor interacts with other variables already mentioned.
- But even in this computerised age, avalanche prediction is an inexact science and that is because of the variables involved.
- Indeed, when you factor out variables like having children, the wage gap virtually disappears.
- But fire damage was hard to predict, as too many other variables are involved.
- There are tons of variables: light fading, extras being available, going into overtime, make-up delays, actors' egos.
- Childhood mental ability is a significant factor among the variables that predict age at death.
- I build lots of spreadsheets and factor in a lot of variables.
- Even a modest house can be full of complexity when constructive and spatial variables overlap with sociological factors.
- First, gender could be such a salient factor that other variables have little influence.
- It allowed companies which were relocating to factor in such variables as traffic congestion, staff availability and potential for weather damage.
- This station recorded standard climatic variables such as temperature, rainfall, daylight hours, etc.
1. 1.1Mathematics A quantity which during a calculation is assumed to vary or be capable of varying in value.
  〔数〕元；变量；变项；变元
  Example sentencesExamples
  In addition to his work in set theory, he did groundbreaking work in measure theory, the theory of real variables, and game theory.
  Many of these mathematicians turned to other topics such as topology, differential equations, and functions of a complex variable.
  Perhaps his most important contribution was to the calculus of several variables.
  The margin for continuous variables is defined as a one standard deviation increase from the weighted mean.
  That is, the direction of a variable's effect does nor typically change as it interacts with other variables.
2. 1.2Computing A data item that may take on more than one value during the runtime of a program.
  〔计算机〕变量（元）
  Example sentencesExamples
  The application may make copies of the data in local program variables, but it is not required.
  All of the configuration is handled by a few Perl variables at the top of the program.
  A given variable can contain any data type of any length and can then have data of any type and length reassigned to it without producing an error.
  This allows you to easily manage all the resources in the Web site such as, graphic files, data objects and variables.
  The stereotypical assumption is like the default value assigned to a variable in a computer program.
3. 1.3Astronomy
  short for variable star
  Example sentencesExamples
  The first such variable was seen in the constellation Cepheid in 1784.
  The variable stars in the above image are RR Lyrae variables, single stars that pulsate with periods of about half a day.
  The study of variable stars, or just variables, as they are known - is extremely important for understanding the stellar life-cycle.
  Brownlee is an expert on comets and space dust; Szkody is an authority on binary star systems called cataclysmic variables.
4. 1.4variables The region of light, variable winds to the north of the north-east trade winds or (in the southern hemisphere) between the south-east trade winds and the westerlies.
  （东北信风带以北或南半球的东南信风带与西风带之间的）变风区

Derivatives

variableness

noun

The only uncertainty attending the success of coal mining in the coal measure area, is in the variableness of the deposit.
Example sentencesExamples
- The variableness of possible partners only serves to increase the risk of sexual activity.

variably

adverb ˈvɛːrɪəbliˈvɛriəbli

The cells in these cases had variably sized nuclei.
Example sentencesExamples
- Jonson and Wroth interacted socially, and Jonson is variably referred to as both Wroth's mentor and her patron.
- Physicians were, however, documented to be variably involved with family discussions regarding the withdrawal of life support.
- Leaf nitrogen has been shown to respond variably following defoliation.
- The evidence is that the powers have been exercised variably by different police forces, which have often taken different approaches to the proper use of the 1994 Act and its offences.

Origin

Late Middle English: via Old French from Latin variabilis, from variare (see vary).

Definition of variable in US English:

variable

adjectiveˈvɛriəb(ə)lˈverēəb(ə)l

1Not consistent or having a fixed pattern; liable to change.
易变的，多变的，反复无定的
the quality of hospital food is highly variable
医院的食物质量非常变化不定。
awards can be for variable amounts
奖金数量可以很不一样。
Example sentencesExamples
- Moreover, rainfall is highly variable, and the start and end of the two rainy seasons are unreliable.
- The cyclical nature of our weather changes point to the variables in our solar system and even galactic variations.
- Local weather patterns are highly variable, and only long-term changes in averages have any significance.
- The menopause is an event that tends to be highly variable in timing and pattern.
- Second, real economic conditions within Europe are likely to be more variable and volatile.
- Where pertinent, costs will be divided into fixed and variable components to help better determine which option is more economical.
- Ulster Bank will also offer both fixed and variable rate deposit accounts.
- However, as is typical for desert regions, the amount and distribution of yearly rainfall are highly variable.
- The multiple signs and symptoms of intoxication and withdrawal often are not consistent because of variable dosages and the adulteration of drugs.
- All eligible members will get a fixed allocation of 185 shares and a variable amount based on the length of time they have held their policies and the sum invested.
- Make a chart and list all your fixed and variable expenses, down to your weekly lottery ticket purchases.
- Financial reporting patterns were variable both across companies and over time.
- There are two types of interest rate to choose from, i.e.: fixed interest rates and variable interest rates.
- The contractor was subject to a yearly rental, composed of a fixed amount plus a variable amount that depended on yearly profits.
- Canyonlands' climate is extreme and highly variable - temperatures may fluctuate as much as 40 degrees in a single day.
- York's already variable air quality is set to worsen to the point that the city is penalised by the Government.
- Chapter introductions contain inconsistent bits of information and are highly variable in their length and information content.
- In the southern and central parts, weather is more variable from October to April than in the north.
- Even the music, which, whilst variable in quality, has some genuinely affecting moments, ultimately seems insubstantial.
- Staffing is adequate in numbers but variable in quality.
- Very roughly speaking, this process divides expected expenses into fixed and variable components and develops a budget estimate for each.
Synonyms
changeable, changing, varying, shifting, fluctuating, irregular, wavering, vacillating, inconstant, inconsistent, fluid, floating, unsteady, uneven, unstable, unsettled, movable, mutable, protean, chameleonic, unfixed, fitful, capricious, temperamental, fickle, kaleidoscopic, volatile, unpredictable, undependable, unreliable
1. 1.1 (of a wind) tending to change direction.
  （风）方向不定的
  Example sentencesExamples
  The ground level winds were variable, but mostly coming from the north.
  The wind was quite variable during the course of the day, with a 20 km easterly tailwind at the start, turning southerly and reducing as the day progressed.
  The variable winds and mild weather last Saturday was perfect for the start of the second round of yacht racing off the shores of Ocean Marina.
  The weather was scattered low clouds, light and variable winds, with thunderstorms in the area.
  On another day, light and variable winds, combined with strong tides, affected competition.
  The isobars are more or less concentric and are widely spaced around the centre of the high and thus, in contrast to depressions, winds are usually light and sometimes rather variable.
  In their quest to achieve good results, competitors faced the challenges of not only the large number of boats, but strong tides and variable wind conditions.
  Winds will be light and variable and the nights will be misty, with fog patches.
  Synonyms
  changeable, changing, varying, shifting, fluctuating, irregular, wavering, vacillating, inconstant, inconsistent, fluid, floating, unsteady, uneven, unstable, unsettled, movable, mutable, protean, chameleonic, unfixed, fitful, capricious, temperamental, fickle, kaleidoscopic, volatile, unpredictable, undependable, unreliable
2. 1.2Mathematics (of a quantity) able to assume different numerical values.
  〔数〕（数字）变量的
  Example sentencesExamples
  Brown's formulae involved some 1,650 trigonometric terms, many of them with variable coefficients.
  As gene diversity is a continuous variable, the expected value of the parameter was calculated using a sliding window of 0.0125.
  By examining the limits of sums, products and quotients of variable quantities, Mengoli was setting up the basic rules if the calculus thirty years before Newton and Leibniz.
  He replaced the differential operator d/dx by a variable p transforming a differential equation into an algebraic equation.
  In particular he published a paper on the Cauchy problem for equations with variable coefficients in 1956.
  He extended the applications of the operational method to linear ordinary differential equations with variable coefficients.
3. 1.3Botany Zoology (of a species) liable to deviate from the typical color or form, or to occur in different colors or forms.
  〔植，动〕变异的；变型的；多变的
  Example sentencesExamples
  In each of these studies the material assigned to Dellea was interpreted as representing one long-ranging and rather highly variable species.
  The species is morphologically variable and exhibits more molecular variation than A. hypogaea.
  Barycrinus rhombiferis is also the most morphologically variable species of Barycrinus, possessing a wide array of polymorphic characters.
  For example, all specimens assigned to the Incertae familiae, discussed below, were treated as members of one highly variable species.
  Although its resemblance to T. sowerbyi is not particularly close, it falls within the morphologic range of this very variable species.
  The Canada Goose is a highly variable species which has long caused headaches for taxonomists.
2Able to be changed or adapted.
可变的；可更改的
the drill has variable speed
这个钻机有可变速度。
Example sentencesExamples
- Newer, quieter fan motors with variable speed drives allow a larger box to be selected at a lower fan speed, reducing noise.
- Efficient motors, variable speed drives and economizer cycles all can be used to minimize energy consumption.
- The heatsink fan operates with variable speed.
- Natural-gas-fired absorption chillers and variable speed pumps, motors and fans increase the efficiency of the cooling and heating system.
- Unlike any other tape drive, VXA can operate at variable speed.
- It also includes a variable temperature control panel and a 30-minute timer that should minimise the risk of over and undercooking.
- All centrifuges have the capability to tilt at various angles and spin at infinitely variable speeds.
- The variable design allows buyers to choose between a layout of four bedrooms and one reception room or three bedrooms and two reception rooms.
- The arrows are metal-tipped and made of carbon, with a shaft diameter of up to 9.3mm and of a variable length depending on the archer.
- Yet sales of variable speed motors make up a small share of the market.
- Temperature is variable from 0° to 210° Celsius and the unit can produce cold water, hot water and wet or dry steam.
- ‘When you are operating a motor with variable speed you have more flexibility,’ he says.
- As an example, we like to think of the English language as infinitely variable and rich.
- A drill with variable speeds is crucial; if you don't own one, buy one - it's a must-have tool.
- The horsepower varies from 140 to 180, and variable horsepower is available on all models.
- An infinitely variable camshaft timing device has a control valve located in the rotor.
- The university was able to upgrade all of its chillers to high-efficiency units and install variable speed pumping units.
1. 2.1 (of a gear) designed to give varying ratios or speeds.
  （齿轮）变速的
  Example sentencesExamples
  Thanks to a continuously variable transmission, throttle response is very linear as gear ratios are always optimized for the available engine power and road conditions.
  The invention of variable gearing enabled bicyclists and cars alike to change the speed of peak efficiency.
  Japan's leading maker of continuously variable transmissions is gearing up for a big increase in sales over the next five years.
  In addition to a standard five-speed manual transmission, there is a new five speed automatic and a continuously variable transmission.
  The CVT in the car's name stands for continuously variable transmission.

nounˈvɛriəb(ə)lˈverēəb(ə)l

1An element, feature, or factor that is liable to vary or change.
可变性；可变因素
there are too many variables involved to make any meaningful predictions
涉及的可变因素太多，不可能作有意义的预言。
Example sentencesExamples
- It is the interaction of these variables and other modifying variables, such as demographics, that allow for the prediction of health behaviors.
- First, gender could be such a salient factor that other variables have little influence.
- But fire damage was hard to predict, as too many other variables are involved.
- Ball trajectory into a bunker can determine the outcome of a lie in a bunker, and this factor interacts with other variables already mentioned.
- Luck is the one thing clubs can't factor into their timing; the one variable that can throw out the whole plan for success if a key player is put out for the rest of the year.
- There are so many other variables involved that it is impossible to know.
- There are tons of variables: light fading, extras being available, going into overtime, make-up delays, actors' egos.
- One of the most important variables is the timing of the beginning of the wet season.
- Even a modest house can be full of complexity when constructive and spatial variables overlap with sociological factors.
- Indeed, when you factor out variables like having children, the wage gap virtually disappears.
- There is almost a nightmare element to the many variables that are coming together at one point in time.
- This station recorded standard climatic variables such as temperature, rainfall, daylight hours, etc.
- Climate-change forecasts… are like financial forecasts but involve a vastly more complex array of variables.
- I build lots of spreadsheets and factor in a lot of variables.
- But even in this computerised age, avalanche prediction is an inexact science and that is because of the variables involved.
- Understand that in college admissions, grades are only one of the many variables that are factored into the selection process.
- The test requires a number of independent observations of the same variable over a period of time.
- Childhood mental ability is a significant factor among the variables that predict age at death.
- ‘Some no doubt merit a prison sentence, but there are a whole range of significant variables involved,’ he explained.
- It allowed companies which were relocating to factor in such variables as traffic congestion, staff availability and potential for weather damage.
1. 1.1Mathematics A quantity which during a calculation is assumed to vary or be capable of varying in value.
  〔数〕元；变量；变项；变元
  Example sentencesExamples
  In addition to his work in set theory, he did groundbreaking work in measure theory, the theory of real variables, and game theory.
  That is, the direction of a variable's effect does nor typically change as it interacts with other variables.
  Perhaps his most important contribution was to the calculus of several variables.
  The margin for continuous variables is defined as a one standard deviation increase from the weighted mean.
  Many of these mathematicians turned to other topics such as topology, differential equations, and functions of a complex variable.
2. 1.2Computing A data item that may take on more than one value during the runtime of a program.
  〔计算机〕变量（元）
  Example sentencesExamples
  The application may make copies of the data in local program variables, but it is not required.
  The stereotypical assumption is like the default value assigned to a variable in a computer program.
  This allows you to easily manage all the resources in the Web site such as, graphic files, data objects and variables.
  All of the configuration is handled by a few Perl variables at the top of the program.
  A given variable can contain any data type of any length and can then have data of any type and length reassigned to it without producing an error.
3. 1.3Astronomy
  short for variable star
  Example sentencesExamples
  The study of variable stars, or just variables, as they are known - is extremely important for understanding the stellar life-cycle.
  The first such variable was seen in the constellation Cepheid in 1784.
  The variable stars in the above image are RR Lyrae variables, single stars that pulsate with periods of about half a day.
  Brownlee is an expert on comets and space dust; Szkody is an authority on binary star systems called cataclysmic variables.
4. 1.4variables The region of light, variable winds to the north of the northeast trade winds or (in the southern hemisphere) between the southeast trade winds and the westerlies.
  （东北信风带以北或南半球的东南信风带与西风带之间的）变风区

Origin

Late Middle English: via Old French from Latin variabilis, from variare (see vary).

单词	variable
释义	Definition of variable in English: variable adjective ˈvɛːrɪəb(ə)lˈvɛriəb(ə)l 1Not consistent or having a fixed pattern; liable to change. 易变的，多变的，反复无定的 the quality of hospital food is highly variable 医院的食物质量非常变化不定。 awards can be for variable amounts 奖金数量可以很不一样。 Example sentencesExamples Staffing is adequate in numbers but variable in quality. The menopause is an event that tends to be highly variable in timing and pattern. The contractor was subject to a yearly rental, composed of a fixed amount plus a variable amount that depended on yearly profits. Local weather patterns are highly variable, and only long-term changes in averages have any significance. The cyclical nature of our weather changes point to the variables in our solar system and even galactic variations. All eligible members will get a fixed allocation of 185 shares and a variable amount based on the length of time they have held their policies and the sum invested. York's already variable air quality is set to worsen to the point that the city is penalised by the Government. In the southern and central parts, weather is more variable from October to April than in the north. There are two types of interest rate to choose from, i.e.: fixed interest rates and variable interest rates. Ulster Bank will also offer both fixed and variable rate deposit accounts. Chapter introductions contain inconsistent bits of information and are highly variable in their length and information content. Where pertinent, costs will be divided into fixed and variable components to help better determine which option is more economical. However, as is typical for desert regions, the amount and distribution of yearly rainfall are highly variable. Financial reporting patterns were variable both across companies and over time. The multiple signs and symptoms of intoxication and withdrawal often are not consistent because of variable dosages and the adulteration of drugs. Very roughly speaking, this process divides expected expenses into fixed and variable components and develops a budget estimate for each. Canyonlands' climate is extreme and highly variable - temperatures may fluctuate as much as 40 degrees in a single day. Moreover, rainfall is highly variable, and the start and end of the two rainy seasons are unreliable. Even the music, which, whilst variable in quality, has some genuinely affecting moments, ultimately seems insubstantial. Make a chart and list all your fixed and variable expenses, down to your weekly lottery ticket purchases. Second, real economic conditions within Europe are likely to be more variable and volatile. Synonyms changeable, changing, varying, shifting, fluctuating, irregular, wavering, vacillating, inconstant, inconsistent, fluid, floating, unsteady, uneven, unstable, unsettled, movable, mutable, protean, chameleonic, unfixed, fitful, capricious, temperamental, fickle, kaleidoscopic, volatile, unpredictable, undependable, unreliable 1.1 (of a wind) tending to change direction. （风）方向不定的 winds will be light and variable Example sentencesExamples Winds will be light and variable and the nights will be misty, with fog patches. On another day, light and variable winds, combined with strong tides, affected competition. In their quest to achieve good results, competitors faced the challenges of not only the large number of boats, but strong tides and variable wind conditions. The wind was quite variable during the course of the day, with a 20 km easterly tailwind at the start, turning southerly and reducing as the day progressed. The ground level winds were variable, but mostly coming from the north. The weather was scattered low clouds, light and variable winds, with thunderstorms in the area. The variable winds and mild weather last Saturday was perfect for the start of the second round of yacht racing off the shores of Ocean Marina. The isobars are more or less concentric and are widely spaced around the centre of the high and thus, in contrast to depressions, winds are usually light and sometimes rather variable. Synonyms changeable, changing, varying, shifting, fluctuating, irregular, wavering, vacillating, inconstant, inconsistent, fluid, floating, unsteady, uneven, unstable, unsettled, movable, mutable, protean, chameleonic, unfixed, fitful, capricious, temperamental, fickle, kaleidoscopic, volatile, unpredictable, undependable, unreliable 1.2Mathematics (of a quantity) able to assume different numerical values. 〔数〕（数字）变量的 Example sentencesExamples In particular he published a paper on the Cauchy problem for equations with variable coefficients in 1956. As gene diversity is a continuous variable, the expected value of the parameter was calculated using a sliding window of 0.0125. He replaced the differential operator d/dx by a variable p transforming a differential equation into an algebraic equation. By examining the limits of sums, products and quotients of variable quantities, Mengoli was setting up the basic rules if the calculus thirty years before Newton and Leibniz. Brown's formulae involved some 1,650 trigonometric terms, many of them with variable coefficients. He extended the applications of the operational method to linear ordinary differential equations with variable coefficients. 1.3Zoology Botany (of a species) liable to deviate from the typical colour or form, or to occur in different colours or forms. 〔植，动〕变异的；变型的；多变的 Example sentencesExamples For example, all specimens assigned to the Incertae familiae, discussed below, were treated as members of one highly variable species. In each of these studies the material assigned to Dellea was interpreted as representing one long-ranging and rather highly variable species. The species is morphologically variable and exhibits more molecular variation than A. hypogaea. Barycrinus rhombiferis is also the most morphologically variable species of Barycrinus, possessing a wide array of polymorphic characters. The Canada Goose is a highly variable species which has long caused headaches for taxonomists. Although its resemblance to T. sowerbyi is not particularly close, it falls within the morphologic range of this very variable species. 2Able to be changed or adapted. 可变的；可更改的 the drill has variable speed 这个钻机有可变速度。 Example sentencesExamples Efficient motors, variable speed drives and economizer cycles all can be used to minimize energy consumption. Newer, quieter fan motors with variable speed drives allow a larger box to be selected at a lower fan speed, reducing noise. As an example, we like to think of the English language as infinitely variable and rich. Natural-gas-fired absorption chillers and variable speed pumps, motors and fans increase the efficiency of the cooling and heating system. The variable design allows buyers to choose between a layout of four bedrooms and one reception room or three bedrooms and two reception rooms. Unlike any other tape drive, VXA can operate at variable speed. A drill with variable speeds is crucial; if you don't own one, buy one - it's a must-have tool. The university was able to upgrade all of its chillers to high-efficiency units and install variable speed pumping units. All centrifuges have the capability to tilt at various angles and spin at infinitely variable speeds. Temperature is variable from 0° to 210° Celsius and the unit can produce cold water, hot water and wet or dry steam. The arrows are metal-tipped and made of carbon, with a shaft diameter of up to 9.3mm and of a variable length depending on the archer. The heatsink fan operates with variable speed. ‘When you are operating a motor with variable speed you have more flexibility,’ he says. The horsepower varies from 140 to 180, and variable horsepower is available on all models. Yet sales of variable speed motors make up a small share of the market. An infinitely variable camshaft timing device has a control valve located in the rotor. It also includes a variable temperature control panel and a 30-minute timer that should minimise the risk of over and undercooking. 2.1 (of a gear) designed to give varying ratios or speeds. （齿轮）变速的 Example sentencesExamples The invention of variable gearing enabled bicyclists and cars alike to change the speed of peak efficiency. The CVT in the car's name stands for continuously variable transmission. Thanks to a continuously variable transmission, throttle response is very linear as gear ratios are always optimized for the available engine power and road conditions. Japan's leading maker of continuously variable transmissions is gearing up for a big increase in sales over the next five years. In addition to a standard five-speed manual transmission, there is a new five speed automatic and a continuously variable transmission. noun ˈvɛːrɪəb(ə)lˈvɛriəb(ə)l 1An element, feature, or factor that is liable to vary or change. 可变性；可变因素 there are too many variables involved to make any meaningful predictions 涉及的可变因素太多，不可能作有意义的预言。 Example sentencesExamples There are so many other variables involved that it is impossible to know. ‘Some no doubt merit a prison sentence, but there are a whole range of significant variables involved,’ he explained. Luck is the one thing clubs can't factor into their timing; the one variable that can throw out the whole plan for success if a key player is put out for the rest of the year. One of the most important variables is the timing of the beginning of the wet season. There is almost a nightmare element to the many variables that are coming together at one point in time. It is the interaction of these variables and other modifying variables, such as demographics, that allow for the prediction of health behaviors. Understand that in college admissions, grades are only one of the many variables that are factored into the selection process. Climate-change forecasts… are like financial forecasts but involve a vastly more complex array of variables. The test requires a number of independent observations of the same variable over a period of time. Ball trajectory into a bunker can determine the outcome of a lie in a bunker, and this factor interacts with other variables already mentioned. But even in this computerised age, avalanche prediction is an inexact science and that is because of the variables involved. Indeed, when you factor out variables like having children, the wage gap virtually disappears. But fire damage was hard to predict, as too many other variables are involved. There are tons of variables: light fading, extras being available, going into overtime, make-up delays, actors' egos. Childhood mental ability is a significant factor among the variables that predict age at death. I build lots of spreadsheets and factor in a lot of variables. Even a modest house can be full of complexity when constructive and spatial variables overlap with sociological factors. First, gender could be such a salient factor that other variables have little influence. It allowed companies which were relocating to factor in such variables as traffic congestion, staff availability and potential for weather damage. This station recorded standard climatic variables such as temperature, rainfall, daylight hours, etc. 1.1Mathematics A quantity which during a calculation is assumed to vary or be capable of varying in value. 〔数〕元；变量；变项；变元 Example sentencesExamples In addition to his work in set theory, he did groundbreaking work in measure theory, the theory of real variables, and game theory. Many of these mathematicians turned to other topics such as topology, differential equations, and functions of a complex variable. Perhaps his most important contribution was to the calculus of several variables. The margin for continuous variables is defined as a one standard deviation increase from the weighted mean. That is, the direction of a variable's effect does nor typically change as it interacts with other variables. 1.2Computing A data item that may take on more than one value during the runtime of a program. 〔计算机〕变量（元） Example sentencesExamples The application may make copies of the data in local program variables, but it is not required. All of the configuration is handled by a few Perl variables at the top of the program. A given variable can contain any data type of any length and can then have data of any type and length reassigned to it without producing an error. This allows you to easily manage all the resources in the Web site such as, graphic files, data objects and variables. The stereotypical assumption is like the default value assigned to a variable in a computer program. 1.3Astronomy short for variable star Example sentencesExamples The first such variable was seen in the constellation Cepheid in 1784. The variable stars in the above image are RR Lyrae variables, single stars that pulsate with periods of about half a day. The study of variable stars, or just variables, as they are known - is extremely important for understanding the stellar life-cycle. Brownlee is an expert on comets and space dust; Szkody is an authority on binary star systems called cataclysmic variables. 1.4variables The region of light, variable winds to the north of the north-east trade winds or (in the southern hemisphere) between the south-east trade winds and the westerlies. （东北信风带以北或南半球的东南信风带与西风带之间的）变风区 Derivatives variableness noun The only uncertainty attending the success of coal mining in the coal measure area, is in the variableness of the deposit. Example sentencesExamples The variableness of possible partners only serves to increase the risk of sexual activity. variably adverb ˈvɛːrɪəbliˈvɛriəbli The cells in these cases had variably sized nuclei. Example sentencesExamples Jonson and Wroth interacted socially, and Jonson is variably referred to as both Wroth's mentor and her patron. Physicians were, however, documented to be variably involved with family discussions regarding the withdrawal of life support. Leaf nitrogen has been shown to respond variably following defoliation. The evidence is that the powers have been exercised variably by different police forces, which have often taken different approaches to the proper use of the 1994 Act and its offences. Origin Late Middle English: via Old French from Latin variabilis, from variare (see vary). Definition of variable in US English: variable adjectiveˈvɛriəb(ə)lˈverēəb(ə)l 1Not consistent or having a fixed pattern; liable to change. 易变的，多变的，反复无定的 the quality of hospital food is highly variable 医院的食物质量非常变化不定。 awards can be for variable amounts 奖金数量可以很不一样。 Example sentencesExamples Moreover, rainfall is highly variable, and the start and end of the two rainy seasons are unreliable. The cyclical nature of our weather changes point to the variables in our solar system and even galactic variations. Local weather patterns are highly variable, and only long-term changes in averages have any significance. The menopause is an event that tends to be highly variable in timing and pattern. Second, real economic conditions within Europe are likely to be more variable and volatile. Where pertinent, costs will be divided into fixed and variable components to help better determine which option is more economical. Ulster Bank will also offer both fixed and variable rate deposit accounts. However, as is typical for desert regions, the amount and distribution of yearly rainfall are highly variable. The multiple signs and symptoms of intoxication and withdrawal often are not consistent because of variable dosages and the adulteration of drugs. All eligible members will get a fixed allocation of 185 shares and a variable amount based on the length of time they have held their policies and the sum invested. Make a chart and list all your fixed and variable expenses, down to your weekly lottery ticket purchases. Financial reporting patterns were variable both across companies and over time. There are two types of interest rate to choose from, i.e.: fixed interest rates and variable interest rates. The contractor was subject to a yearly rental, composed of a fixed amount plus a variable amount that depended on yearly profits. Canyonlands' climate is extreme and highly variable - temperatures may fluctuate as much as 40 degrees in a single day. York's already variable air quality is set to worsen to the point that the city is penalised by the Government. Chapter introductions contain inconsistent bits of information and are highly variable in their length and information content. In the southern and central parts, weather is more variable from October to April than in the north. Even the music, which, whilst variable in quality, has some genuinely affecting moments, ultimately seems insubstantial. Staffing is adequate in numbers but variable in quality. Very roughly speaking, this process divides expected expenses into fixed and variable components and develops a budget estimate for each. Synonyms changeable, changing, varying, shifting, fluctuating, irregular, wavering, vacillating, inconstant, inconsistent, fluid, floating, unsteady, uneven, unstable, unsettled, movable, mutable, protean, chameleonic, unfixed, fitful, capricious, temperamental, fickle, kaleidoscopic, volatile, unpredictable, undependable, unreliable 1.1 (of a wind) tending to change direction. （风）方向不定的 Example sentencesExamples The ground level winds were variable, but mostly coming from the north. The wind was quite variable during the course of the day, with a 20 km easterly tailwind at the start, turning southerly and reducing as the day progressed. The variable winds and mild weather last Saturday was perfect for the start of the second round of yacht racing off the shores of Ocean Marina. The weather was scattered low clouds, light and variable winds, with thunderstorms in the area. On another day, light and variable winds, combined with strong tides, affected competition. The isobars are more or less concentric and are widely spaced around the centre of the high and thus, in contrast to depressions, winds are usually light and sometimes rather variable. In their quest to achieve good results, competitors faced the challenges of not only the large number of boats, but strong tides and variable wind conditions. Winds will be light and variable and the nights will be misty, with fog patches. Synonyms changeable, changing, varying, shifting, fluctuating, irregular, wavering, vacillating, inconstant, inconsistent, fluid, floating, unsteady, uneven, unstable, unsettled, movable, mutable, protean, chameleonic, unfixed, fitful, capricious, temperamental, fickle, kaleidoscopic, volatile, unpredictable, undependable, unreliable 1.2Mathematics (of a quantity) able to assume different numerical values. 〔数〕（数字）变量的 Example sentencesExamples Brown's formulae involved some 1,650 trigonometric terms, many of them with variable coefficients. As gene diversity is a continuous variable, the expected value of the parameter was calculated using a sliding window of 0.0125. By examining the limits of sums, products and quotients of variable quantities, Mengoli was setting up the basic rules if the calculus thirty years before Newton and Leibniz. He replaced the differential operator d/dx by a variable p transforming a differential equation into an algebraic equation. In particular he published a paper on the Cauchy problem for equations with variable coefficients in 1956. He extended the applications of the operational method to linear ordinary differential equations with variable coefficients. 1.3Botany Zoology (of a species) liable to deviate from the typical color or form, or to occur in different colors or forms. 〔植，动〕变异的；变型的；多变的 Example sentencesExamples In each of these studies the material assigned to Dellea was interpreted as representing one long-ranging and rather highly variable species. The species is morphologically variable and exhibits more molecular variation than A. hypogaea. Barycrinus rhombiferis is also the most morphologically variable species of Barycrinus, possessing a wide array of polymorphic characters. For example, all specimens assigned to the Incertae familiae, discussed below, were treated as members of one highly variable species. Although its resemblance to T. sowerbyi is not particularly close, it falls within the morphologic range of this very variable species. The Canada Goose is a highly variable species which has long caused headaches for taxonomists. 2Able to be changed or adapted. 可变的；可更改的 the drill has variable speed 这个钻机有可变速度。 Example sentencesExamples Newer, quieter fan motors with variable speed drives allow a larger box to be selected at a lower fan speed, reducing noise. Efficient motors, variable speed drives and economizer cycles all can be used to minimize energy consumption. The heatsink fan operates with variable speed. Natural-gas-fired absorption chillers and variable speed pumps, motors and fans increase the efficiency of the cooling and heating system. Unlike any other tape drive, VXA can operate at variable speed. It also includes a variable temperature control panel and a 30-minute timer that should minimise the risk of over and undercooking. All centrifuges have the capability to tilt at various angles and spin at infinitely variable speeds. The variable design allows buyers to choose between a layout of four bedrooms and one reception room or three bedrooms and two reception rooms. The arrows are metal-tipped and made of carbon, with a shaft diameter of up to 9.3mm and of a variable length depending on the archer. Yet sales of variable speed motors make up a small share of the market. Temperature is variable from 0° to 210° Celsius and the unit can produce cold water, hot water and wet or dry steam. ‘When you are operating a motor with variable speed you have more flexibility,’ he says. As an example, we like to think of the English language as infinitely variable and rich. A drill with variable speeds is crucial; if you don't own one, buy one - it's a must-have tool. The horsepower varies from 140 to 180, and variable horsepower is available on all models. An infinitely variable camshaft timing device has a control valve located in the rotor. The university was able to upgrade all of its chillers to high-efficiency units and install variable speed pumping units. 2.1 (of a gear) designed to give varying ratios or speeds. （齿轮）变速的 Example sentencesExamples Thanks to a continuously variable transmission, throttle response is very linear as gear ratios are always optimized for the available engine power and road conditions. The invention of variable gearing enabled bicyclists and cars alike to change the speed of peak efficiency. Japan's leading maker of continuously variable transmissions is gearing up for a big increase in sales over the next five years. In addition to a standard five-speed manual transmission, there is a new five speed automatic and a continuously variable transmission. The CVT in the car's name stands for continuously variable transmission. nounˈvɛriəb(ə)lˈverēəb(ə)l 1An element, feature, or factor that is liable to vary or change. 可变性；可变因素 there are too many variables involved to make any meaningful predictions 涉及的可变因素太多，不可能作有意义的预言。 Example sentencesExamples It is the interaction of these variables and other modifying variables, such as demographics, that allow for the prediction of health behaviors. First, gender could be such a salient factor that other variables have little influence. But fire damage was hard to predict, as too many other variables are involved. Ball trajectory into a bunker can determine the outcome of a lie in a bunker, and this factor interacts with other variables already mentioned. Luck is the one thing clubs can't factor into their timing; the one variable that can throw out the whole plan for success if a key player is put out for the rest of the year. There are so many other variables involved that it is impossible to know. There are tons of variables: light fading, extras being available, going into overtime, make-up delays, actors' egos. One of the most important variables is the timing of the beginning of the wet season. Even a modest house can be full of complexity when constructive and spatial variables overlap with sociological factors. Indeed, when you factor out variables like having children, the wage gap virtually disappears. There is almost a nightmare element to the many variables that are coming together at one point in time. This station recorded standard climatic variables such as temperature, rainfall, daylight hours, etc. Climate-change forecasts… are like financial forecasts but involve a vastly more complex array of variables. I build lots of spreadsheets and factor in a lot of variables. But even in this computerised age, avalanche prediction is an inexact science and that is because of the variables involved. Understand that in college admissions, grades are only one of the many variables that are factored into the selection process. The test requires a number of independent observations of the same variable over a period of time. Childhood mental ability is a significant factor among the variables that predict age at death. ‘Some no doubt merit a prison sentence, but there are a whole range of significant variables involved,’ he explained. It allowed companies which were relocating to factor in such variables as traffic congestion, staff availability and potential for weather damage. 1.1Mathematics A quantity which during a calculation is assumed to vary or be capable of varying in value. 〔数〕元；变量；变项；变元 Example sentencesExamples In addition to his work in set theory, he did groundbreaking work in measure theory, the theory of real variables, and game theory. That is, the direction of a variable's effect does nor typically change as it interacts with other variables. Perhaps his most important contribution was to the calculus of several variables. The margin for continuous variables is defined as a one standard deviation increase from the weighted mean. Many of these mathematicians turned to other topics such as topology, differential equations, and functions of a complex variable. 1.2Computing A data item that may take on more than one value during the runtime of a program. 〔计算机〕变量（元） Example sentencesExamples The application may make copies of the data in local program variables, but it is not required. The stereotypical assumption is like the default value assigned to a variable in a computer program. This allows you to easily manage all the resources in the Web site such as, graphic files, data objects and variables. All of the configuration is handled by a few Perl variables at the top of the program. A given variable can contain any data type of any length and can then have data of any type and length reassigned to it without producing an error. 1.3Astronomy short for variable star Example sentencesExamples The study of variable stars, or just variables, as they are known - is extremely important for understanding the stellar life-cycle. The first such variable was seen in the constellation Cepheid in 1784. The variable stars in the above image are RR Lyrae variables, single stars that pulsate with periods of about half a day. Brownlee is an expert on comets and space dust; Szkody is an authority on binary star systems called cataclysmic variables. 1.4variables The region of light, variable winds to the north of the northeast trade winds or (in the southern hemisphere) between the southeast trade winds and the westerlies. （东北信风带以北或南半球的东南信风带与西风带之间的）变风区 Origin Late Middle English: via Old French from Latin variabilis, from variare (see vary).
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