单词 | equation |
释义 | equations是equation的复数
复数:equations v. n. solve equation,use equation,rearrange equation adj. n. mathematical equation,algebraic equation,above equation 例句释义: 方程式,均衡,相等,反应式,等式,方程组,数学关系式 1. and that this corrected equation is itself only an imperfect approximation to an infinite set of quantum field-theoretical equations. 而这个得以纠正之方程式就其本身而言也只是一个不完美之近似值,趋近于无穷无尽之一整套量子场论方程式。 wzksw.com 2. OK, so let me move on a bit and point out that with parametric equations, we've looked also at things like velocity and acceleration. 再来深入研究一下参数方程,我们以前还学过速度和加速度的。 open.163.com 3. Number consecutively any equations that have to be displayed separate from the text (if referred to explicitly in the text). 人数连续任何方程都必须表现出有别于文(如果中明确地提到了文本)。 blog.sina.com.cn 4. Einstein is trying to come up with these equations that will describe how space is curved. He's working deep into the night. 爱因斯坦试图想出这些描述空间是如何弯曲的方程式。他夜以继日的工作。 www.kekenet.com 5. These operations can be called discrete 3 operation. Quantity of these operations and of equations constructed by them will be very huge. 这样的运算称为散三运算,其数目繁多,所能构造的方程亦非常丰富。 blog.sina.com.cn 6. The procedure is only equivalent to the orthogonal extension of the matrix and solution of a set of equations. 其构造过程仅需矩阵的正交扩充和求解方程组。 www.ceps.com.tw 7. In this field, uniform beams have previously been used to depict the buffeting motion of the deck in terms of partial derivative equations. 在本领域历来是用均匀梁的偏微分方程来描述桥面的抖振运动,有限元法的应用基本上是空白。 dictsearch.appspot.com 8. I remember as a, as a mathematics student, thinking, well, you know, where am I ever gonna use simultaneous equations. 我记得还是一个数学系学生的时候就想,你知道的,我究竟要在那里使用联立方程式。 www.eoezone.com 9. This paper presents a very efficient method, referred to as the aggregate function method, for solving nonlinear equations. 本文给出了求解非线性方程组问题的一种有效方法,称为凝聚函数法。 stae.com.cn 10. By means of the qualitative theory, we obtain sufficient conditions and a necessary condition for this kind of equations. 运用常微分方程定性理论的方法,获得了这类方程所有解有界的充分条件和必要条件。 www.ceps.com.tw 1. The subject of partial differential equations, which had its beginnings in the eighteenth century, burgeoned in the nineteenth. 诞生于十八世纪的偏微分方程这门学科,在十九世纪发展起来了。 2. That stance might comfort the authors, but to many readers they will nonetheless seem to pluck equations out of thin air. 这一立场可能会让作者感到安慰,但对许多读者来说,看来他们还是得凭空理解各个方程式。 www.ecocn.org 3. We find simultaneous equations hard so the lessons seem to go on forever! 我们认为,联立方程的经验教训,以便努力似乎永远继续下去! wenwen.soso.com 4. Probably she or he is out there today, working on the equations, getting ready to publish the paper that will win the Nobel Prize. 也许他或她就在今天这个时代,正在解决一些方程式,准备发表论文并因此获得诺贝尔奖。 www.bing.com 5. Turns out, some of these equations were very familiar: the law of conservation of momentum, and Newton's second law of motion. 其结果,其中一些方程非常眼熟,比如动量守恒定律和牛顿第二定律。 www.bing.com 6. The Stern book may be careful to avoid academic gobbledygook and complex equations, but it cannot be described as a light read. 这本书可能小心的刻意避免学院派的官样文章和复杂的方程式,但也不能将它说成消遣读物。 www.ecocn.org 7. In the analysis of very complex systems, the governing equations for the system components form a large set of simultaneous equations. 在非常复杂的系统的分析中,系统组件的控制方程是由一个大的联立方程形成的。 dictsearch.appspot.com 8. Finally, the paper will elicit the general equations of motion about six-DOF, considering the relative motion between the two aircraft. 最后,建立的模型中是考虑两个飞行器之间的相对运动,导出通用的六自由度运动方程。 zhidao.baidu.com 9. Secondly, the equations of every joint angle in all lower limbs were derived by real-time inverse kinematics analytic method. 然后,通过实时的逆运动学解析法推导出机器人下肢关节各个关节角的求解方程; www.joca.cn 10. Case studies indicate the correctness and practicability of these equations which can be used in reservoir engineering study and prediction. 用较多的实例证实了递减率微分方程与相公式的正确性与实用性,这些公式可用于油气藏工程研究与预测。 www.ceps.com.tw 1. Now, it's also very useful to look at some of the relations that come out of these fundamental equations. 我们接下来可以考察,从这些基本方程中得出的一些方程。 open.163.com 2. Jared stands up and begins to write frenzied equations on the board, Bill counters with an equation of his own. 贾里德站起来开始在黑板上写着狂乱的方程式,而比尔用他自己的一个方程式来反对。 dictsearch.appspot.com 3. We live in a society that completely tends to valorize symbolic forms of representation -- algebraic representations , equations , codes . 我们生活在一个完全趋向于为各种象征性的表述方式规定价格的社会,代数式的表述,等式,编码等等。 www.bing.com 4. By means of the numerical solution to deal with the systematical equations, the important flow laws to actual engineering are obtained. 通过数值求解分层流的数学方程,得到了对工程实际应用有重要价值的流动规律。 www.chemyq.com 5. On a small scale, they now have the equations to simulate neurons and the electro-chemical reactions between them. 现在,他们已经可以小规模地模拟神经元,以及神经元之间的电化学反应。 www.bing.com 6. Some of the comments are well taken , but let me restate my argument in a slightly more formal way , although I will still avoid equations . 有些评论是很中肯的,但是让我还是用稍微有点正式的方式重申一下我的论点吧,虽然我还是不把其与正式场合相提并论。 www.bing.com 7. In this fashion, this paper presents a simple method used to establish reentry motion equations of a satellite. 在此基础上,文章建立了卫星返回运动的方程组。 zgkj.cast.cn 8. A set of equations was drawn up that represented the interactions of these different factors in mathematical form, leading to. . . Ding! 代表这些不同的因素互作用以数学形式的一套等式被草拟了,带领…丁! goabroad.zhishi.sohu.com 9. Still, once all its equations have been solved, a simple fact remains: Most women enter prostitution for the money. 一旦所有的公式都解答出来,一个简单的事实就摆在面前:大多数女性是为钱而卖淫的。 www.douban.com 10. We do advise, however, against getting any of these equations tattooed on your body, much less branded. 不管怎样,我们郑重地告诫诸位,千万不要把这些方程式纹到自己身体上,更不要说用火烙了。 www.bing.com 1. We would expect to see detailed sketches, major equations and plots which demonstrate that you are on the right track. 我们希望看到详细草图、主要方程式和图标来表明你的进展正常。 www.myoops.org 2. He made notes in the margins and corrected some of the equations. 他在书中页边空白处写下评注,并纠正了一些方程式的错误。 www.america.gov 3. Data-flow analysis is typically path-insensitive, though it is possible to define data-flow equations that yield a path-sensitive analysis. 数据流分析是典型的路径不敏感的,尽管可以定义数据流方程产生路径敏感的分析是可能的。 instapedia.com 4. When he put together the equations of general relativity back in 1916, Einstein applied them to the universe as a whole. 1916年他得到了广义相对论方程,并将宇宙看做整体进行计算。 www.bing.com 5. It is an important method that the exact solutions of the heat conduction equations test the correctness of the numerical solutions. 反之,用数值解来分析精确解的完整性也是一种有意义的方法。 www.dictall.com 6. The differential equations of piezoelectric radial motion have been derived in terms of radial displacement and electric potential. 微分方程压电径向运动已得出在径向位移和电势。 www.syyxw.com 7. The broad question of which equations are solvable by algebraic operations was definitely and comprehensively answered by Galois. 哪些方程可用代数运算求解,这个重要问题由Galois明确而透彻地回答了。 8. These have been developed by the numerical integration of the differential equations of gas motion for a spherical blast wave in air. 这些都是根据空中球形爆震波气体运动的微分方程的数值积分得到的。 9. This is China, remember. The economic equations that may seem to work obviously elsewhere, do not necessarily do the trick here. 要记住,这是中国,也许在其他地方看似十分有效的经济策略在中国不一定奏效。 chinese.wsj.com 10. Builds the performance curve regression equations of two types of pumps with the least square method, and gains the fitted curve equations. 利用最小二乘法建立了两种型号水泵的性能曲线回归方程组,从而得到了水泵的性能曲线方程。 www.ceps.com.tw 1. The general dynamical equations of the system are derived using the concepts of path vectors and augmented bodies. 利用通路矢量和增广体概念导出系统的动力学普遍方程。 ams.cstam.org.cn 2. The first "computers" were indeed people. The word originally meant an individual who solved equations, often using a mechanical calculator. 最开始computer这个词确实指人,本义是使用机械计算器来解方程的人。 www.bing.com 3. Also we point out that this kind of variational equations has a main theoretical meaning in the study of stochastic controls. 同时,还指出这类变分方程在随机控制的研究中有着重要的理论意义。 www.actamath.com 4. Firstly, the statics model of the bearing is established and a set of equilibrium equations are obtained. 首先,建立轴承的静力模型并得到一组平衡方程; www.caesv.cn 5. He developed a mathematical model that produces precise analytical solutions by solving of a set of mathematical equations. 这就要求利用逐步近似法来发展一种数学模式,通过解答一整套数学方程式取得精确分析结果。 blog.sina.com.cn 6. by vibration differential equations, crack deformation equation is derived by the concept of mobility. 通过振动微分方程,借用导纳概念建立裂纹处变形协调方程。 www.13191.com 7. Exponential, hyperbolic, and harmonic curve equations are often used to mathematically express the decline curve. 指数曲线方程、双曲线方程以及调和曲线方程常用来数学表达递减曲线。 www.infopetro.com.cn 8. Finally, we used the obtained results to discuss the existence of multiple solutions of differential equations and a difference equation. 其次,我们运用此结论讨论了几个微分方程、差分方程多解的存在性。 www.ceps.com.tw 9. During his time at Oxford he published the economic models and equations for which he would eventually be awarded his Nobel Prize. 他在牛津大学期间,出版了关于经济模式和公式的著作,并因此最终将被授予诺贝尔奖。 item.feedsky.com 10. The governing boundary layer equations were written into a dimensionless form by similarity transformations. 利用相似变换给出了无量纲形式的边界层控制方程。 www.ceps.com.tw 1. Ideally, the air both inside and outside the ball should be included, and the viscosities modelled using Navier-Stokes equations. 真实情况下,球内外的空气都应该包括在内,使用描述粘性牛顿流体的纳维叶-斯托克斯方程来求解; www.bing.com 2. The Jacobian matrix of the 2-DOF parallel manipulator used in kinematics is derived by means of derivation of constraint equations. 同时,利用对机构约束方程求导的方法,建立了2自由度并联机器人机构的运动学雅可比矩阵。 www.fabiao.net 3. The subject of differential and difference equations is an old and much-honored chapter in science. 在微分和差分方程的题目是一个古老的和非常荣幸科学篇章。 www.ccemagz.com 4. Solution of a class of second-order vibration matrix equations is investigated, which are widely used in vibration control fields. 研究了一类二阶振动矩阵方程的求解问题,该方程在振动控制领域得到广泛应用。 stae.com.cn 5. Precisely, as you are undoubtedly gathering, the anomaly is systemic-creating fluctuations in even the most simplistic equations. 太对了,就像你在不容置疑地收集的那样,异常是即使在最简单的方程式里也会有的系统性波动。 blog.cersp.com 6. And some equations were got to control correlation parameter in hydrocyclone for intensifying heat and mass transfer. 同时,推导的有关公式可以为控制旋流器相关参数强化热质传递提供理论指导。 www.chemyq.com 7. Could Einstein's Theory of Relativity be a few mathematical equations away from being disproved? 爱因斯坦的相对论可以用一些数学公式提出反证吗? www.bing.com 8. In the model the complex computation due to various equations in earlier works can be avoided with the number of components unlimited. 该模型避免了已有方法复杂的公式计算,对元件数量没有限制。 www.ceps.com.tw 9. The undisturbed electron density distribution, calculated from the quantum mechanical equations of motion is shown in yellow. 根据量子力学运动学方程的计算,无扰动的电子密度分布在图中以黄色显示。 www.bing.com 10. There was a serendipitous second advantage to working with a library of equations. 偶然[的机会下,人们发现了]用方程库进行工作的第二优势。 www.bing.com 1. But during the election process and after the assassination of Benazir Bhutto, the political equations seemed to have changed clearly. 但是在选举进程的时候和在暗杀贝-布托之后,政治平衡似乎是清楚地(已经)发生变化。 blog.sina.com.cn 2. One of the main topics of the soliton theory is to search for the soliton solutions of nonlinear evolution equations (NLEEs). 寻找非线性偏微分方程的孤子解是孤子理论中一个主要的研究方向。 www.fabiao.net 3. There would be a set of equations relating supply and demand for each product to incomes and prices. 在使每项产品的供求和收入及价格相适应方面就会出现一系列的平衡状态。 4. The other is the initial value problem about the general, the non-autonomous singular perturbation of fractional differential equations. 另一类是一般的非自治奇异摄动分数阶微分方程的初值问题。 www.boshuo.net 5. Einstein is up at the board writing his equations and trying to describe his problem. 爱因斯坦在董事会写他的方程式并试图描绘出他的问题。 www.kekenet.com 6. A set of simultaneous, linear algebraic equations results for the entire structure, in which the structural displacements are unknowns. 阿的同时,线性代数方程的整体结构,在这种结构位移未知结果集。 woyaosou.cn 7. These equations are called differential equations, and their study forms one of the most challenging branches of mathematics. 这些方程称为微分方程,对其研究形成了数学中最具有挑战性的一个分支。 wenku.baidu.com 8. A method of constructing the basic set of solutions of a system of homogeneous constant-coefficient differential equations is introduced. 介绍构造常系数齐线性微分方程组的基本解组的一种方法,并把这种方法进行改进,使求解更为简捷。 tech.zidian8.com 9. This method basically consists in formulating the power flow problem as a set of autonomous ordinary differential equations. 这个办法根底上包括一系列的常微分方程用作公式化能量流问题。 www.pjx8.com 10. We're going to use, very heavily, the equations that you see here that are so familiar with us. 我们将频繁使用,一些我们,相当熟悉的公式。 open.163.com 1. The extra dimensions introduce a correction term into the equations, which ensures that the curvature of an empty brane is not zero . 额外维度在方程式中引进了一个修正项,该修正项确保了一个即便是空的膜其时空曲率亦不为零。 dictsearch.appspot.com 2. There is no general method for solving the equations that you get from this method. You just have to think about them. 用这个拉格朗日方法,你是不能保证解出这个方程组的,你只能对着它想。 open.163.com 3. It is one of the important research fields to apply the methods of wavelet analysis and partial differential equations in image processing. 应用小波分析方法和偏微分方程方法进行图像处理是一个重要课题。 www.ceps.com.tw 4. The Gauss truncation theory is used to linearize the nonlinear equations when taking account of the non-linearity of guys. 当考虑纤绳非线性对桅杆结构的影响时,采用高斯截断理论使非线性方程线性化。 www.airiti.com 5. The nonlinear coupled equations of the perturbed magnetic field and the perturbed temperature are derived in the beginning. 首先导出扰动磁场和扰动温度的非线性耦合方程组。 www.dictall.com 6. The book begins with a basic overview of the field, essential equations, and core concepts of compressible turbulence. 书从领域,必要的方程式和可压缩的混乱的核心概念的基本的概述开始。 dictsearch.appspot.com 7. The equations derived by the eccentric genius are still used to design cars, build bridges and send spacecraft into the cosmos. 这一奇才推出的方程式至今沿用在汽车设计、桥梁修建、宇宙飞船发送这些领域。 www.ecocn.org 8. MathML lets you model mathematical equations -- imagine all the different equations you could create. MathML使您能够对数学等式进行建模。您能创建多少种不同的数学公式呢? www.ibm.com 9. A numerical simulation for a model of wood drying process is considered. The model is given by a couple of nonlinear differential equations. 针对描述木材干燥过程中的一个非线性微分方程模型,用降阶法对其建立了一个差分格式。 www.ceps.com.tw 10. To be useful in solving engineering problems, the differential equations must be integrated. 是有益的,以解决工程问题,微分方程必须综合。 learning.zhishi.sohu.com 1. graphic technology - graphic arts transmission densitometry measurements - terminology , equations , image elements , and procedures. 图形技术。图形工艺传输光密度测定。术语公式图象元素和方法。 www.ichacha.net 2. To solve the set of governing equations , initial conditions have to be properly represented and set up using the latest information . 要求解气象方程组,首先要集合最新资料把初始状况正确地建立起来。 www.bing.com 3. The heat conduction equations considering heat resource are established, and the corresponding boundary conditions are given. 建立了考虑热源项的热传导方程,并给出了相应的边界条件。 www.opticsjournal.net 4. Furthermore, a forest competition algorithm was proposed. To verify the algorithm, it was applied to solve transcendental equations. 为验证算法的合理性和有效性,将其应用于超越方程的求解。 www.ceps.com.tw 5. The gained results are very important to help ones understand and apply Maxwell's equations of time-varying electromagnetic field. 所得结论对于理解和应用时变电磁场基本方程具有重要的指导意义。 www.ceps.com.tw 6. This paper deals with the general boundary value problem for nonlinear elliptic equations of second order. 讨论了二阶非线性椭圆型方程的一般边值问题。 www.ceps.com.tw 7. For most matrix of A, the linear differentiable equations with quasi-periodic finitely differentiable coefficients are reducible. 证明了对大多数的矩阵A,一类系数为有限次可微的拟周期线性常微分方程组是可约的。 dictsearch.appspot.com 8. Predict the temperature usually require only two consecutive months of the establishment of equations and can be recursive relationship. 作温度预报一般只需要连续两个月的资料即可建立方程和递推关系。 www.dgmini.com 9. Correlation coefficient, r, was inappropriately used to describe the significance of curve regression equations. 曲线回归方程往往用相关系数r来表示显著性; www.ceps.com.tw 10. Partial differential equations are solved by first discretizing the equation, bringing it into a finite-dimensional subspace. 偏微分方程求解第一离散方程,使之成为一个有限维子空间。 blog.sina.com.cn 1. Equations of SBFEM for a seepage problem are derived with a transformation from Cartesian coordinates to scaled coordinates. 通过比例坐标与直角坐标之间的转换,推导渗流问题的比例边界有限元方程。 www.ceps.com.tw 2. And that is in the case of the circular orbit, square root of two So these are the numbers that we are going to use today, the equations. 这是在圆形轨道,所以是,这些是我们今天,会用到的数字和方程。 open.163.com 3. The blow-up theory of the solutions for nonlinear evolution equations is an important aspect of partial differential equation. 非线性发展方程解的爆破理论是偏微分方程的重要内容。 www.fabiao.net 4. At a rigid joint of a space frame, three resolution and three moment equations can be written. 在空间框架的一个刚性节点处,可以写出三个分力方程和三个力矩方程。 dictsearch.appspot.com 5. graphic technology - graphic arts reflection densitometry measurements - terminology , equations , image elements and procedures. 图形技术。图形工艺反射光密度测量。术语公式图象元素和程序。 www.ichacha.net 6. The solution of the set of second- order linear differential equations ( 6. 10 ) depends on the eigenvalues of A . 二阶线性微分方程组(6.10)的解依赖于A的特征值。 www.bing.com 7. The performance of logical networks is expressed in terms of equations that are governed by special theorems and rules. 逻辑网络的特性可由专门的定理和规则所确定的公式来表示。 www.jukuu.com 8. Results A recursion formula to the solutions of a class of linear ordinary differential equations with constant coefficients is given. 结果给出了求一类常系数非齐次线性微分方程的特解的递推公式。 www.ceps.com.tw 9. The coefficient functions of the hyperbolic equations considered are assumed to be piecewise constant. 我们假设在所考虑的微分方程中,系数函数为片段常函数。 dictsearch.appspot.com 10. Even though the entire imagery had to be changed, the validity of those equations persisted. 纵使整个形象的描述都必须加以改变,这些方程也继续有效。 www.jukuu.com 1. This theory received support in the 1870s from James Clerk Maxwell's equations showing that light was a form of electromagnetic wave. 这个理论在19世纪70年代得到詹姆斯·克拉克·麦克斯韦方程组的支持,显示光是一种电磁波形式。 www.bing.com 2. Consider the nonlinear delay partial difference equations with continuous arguments Some oscillation criteria of this equation are obtained. 研究具有连续变量的非线性时滞偏差分方程获得了方程的一些振动准则。 www.dictall.com 3. The solution of equations are obtained by means of both Green function method and natural boundary conditions. 利用格林函数法及其自然边界条件转化方程获得解答。 www.ceps.com.tw 4. The oscillation of a class of nonlinear hyperbolic equations with continuous distributed deviating arguments is studied. 研究了一类带连续分布的滞变量的非线性双曲方程的振动性。 dictsearch.appspot.com 5. To estimate the unknown parameters of the equations, the least square parameters estimation method was employed. 采用最小二乘参数辨识方法对模型中的未知参数进行了估计。 www.ceps.com.tw 6. The elementary equations of pressure and open-channel unsteady flow are the essential theory of hydraulic transients of hydropower station. 有压非恒定流和明渠非恒定流的基本方程是水电站水力过渡过程的基本理论。 www.lw23.com 7. A study of the stability of the compressible single-stream shear mixing layers is performed by using parabolized stability equations (PSE). 将抛物化稳定性方程(PSE)方法应用到可压缩单股剪切混合流的稳定性研究中。 hkxb.buaa.edu.cn 8. We consider the initial boundary value problem for a class of nonlinear degenerate wave equations in a bounded domain. 考虑了有界区域上一类非线性退化波动方程的初边值问题。 www.dictall.com 9. The weak nonlinear instability of a nonparallel boundary layer is studied by nonlinear parabolized stability equations(PSE). 采用非线性抛物化稳定性方程(PSE)研究了非平行边界层的弱非线性稳定性。 www.dictall.com 10. Kepler s equations can be solved with the gradual approach, which can be further extended to the solution of the non-linear equations. 求解开普勒方程可用逐次逼近法,这种方法还可推广到非线性方程的求解问题中。 www.dictall.com 1. I've spent the past three and a half years staring at grease boards full of equations. Before that, I spent four years working on my thesis. 过去三年半时间我都在瞪着,写满方程式的板子上。在那之前我花了四年时间写论文。 www.bing.com 2. By using EH11 mode, we have numerically solved the rate equations of a three-level pumping scheme for a fiber laser. 通过采用EH11模式,我们对光纤激光器的三能级抽运速率方程进行了数值求解。 www.opticsjournal.net 3. Conjugate conditions equations are established on the basis of conjugate conditions of two curved surface and meshing theory of gears. 根据两曲面的共轭条件和齿轮啮合原理得到齿轮共轭的共轭条件方程; www.boshuo.net 4. The remarks below the diagrams should be observed; they concern the applicability of the equations to the various operating ranges. 应注意各图解下方的说明;这些说明涉及公式对不同工作范围的适用性。 www.skf.com 5. The theory of the solution of partial differential equations remained to be fashioned . 偏微分方程解的理论还有待于形成。 www.bing.com 6. Uses a reduced-Newton algorithm with a weak line search to solve a set of non-linear algebraic equations. 使用简化的牛顿计算方法和弱队列搜索来解决一系列的非线性代数方程。 www.myoops.org 7. One approach would be, following Newton, to write down the equations for the evolution of the biosphere and solve them. 一种可能的方法是像牛顿一样,写出生物圈进化的方程并解决它。 www.hjenglish.com 8. Unlike Einstein's equations, ECKS gravity takes account of the spin or angular momentum of elementary particles. 不同于爱因斯坦的方程,ECKS万有引力理论考虑了基本粒子的旋转或角动量。 blog.sina.com.cn 9. Since the equations are nonlinear, one has to resort to a numerical solution scheme except for relatively simple problems. 但是,因为方程是非线性的,所以除了比较简单的一些问题之外,都必须依靠数值方法求解。 www.kuenglish.info 10. A note on paper "a simple fast method in finding the analytical solutions to a class of nonlinear partial differential equations" 对“求一类非线性偏微分方程解析解的一种简洁方法”一文的一点注记 www.ilib.cn 1. According to the static balance principle, the general equations for solving the describing parameters are derived and proved reliable. 根据静力平衡原理,推导了求解推力矢量的一般方程。 hkxb.buaa.edu.cn 2. From that moment on, all other classical laws or equations of these disciplines became simplified cases of Maxwell's equations. 所有这一领域其它的经典规律和方程都成为了麦克斯韦方程的简化情况。 www.elanso.com 3. The remainder of the book is devoted to the numerical solutions of these equations. 本书的其他部分则阐明这些方程的数值解。 4. Initially, the equations generated by the program failed to explain the data, but some failures were slightly less wrong than others. 在开始阶段,程序生成的方程还不能解释数据,不过,某些运算的失误与另一些相比要略微少一些。 www.bing.com 5. In this study, these problems refer to a standard form of minimizing a single parameter subject to parameterized linear equations. 本研究将此三问题參照到一个标准模式,其内含单一參數目标式与參數化线性等式。 www.ceps.com.tw 6. To derive mathematical model, dynamic characteristic equations are obtained and the pulse amplitude and time of input shaper was calculated. 通过建立系统的数学模型,求出了动态特性方程,计算出这三种输入整形器脉冲序列的幅值和时间。 nvc.sjtu.edu.cn 7. Measured in the least squares adjustment of the function model to solve problems, eventually reduced to the problem of linear equations. 在最小二乘测量平差的函数模型求解问题中,最后都归结为线性方程组的求解问题。 stae.com.cn 8. A Beautiful Mind It is only in the mysterious equations of love that any logical reasons can be found. 任何合乎逻辑的理由只有在神秘的爱之方程式里才能找到。 spaces.msn.com 9. The kinematic analysis of the planar four-bar linkage and dimensional six-bar linkage can be done by building up the structural equations. 平面四杆机构和空间六杆机构的运动学分析可以通过建立闭链的结构方程来实现。 www.juyy.net 10. The borehole trajectory design to be drilled well with defined direction needs to solve a set of 7-element nonlinear equations. 限定了目标点井眼方向的三维圆弧型井眼轨道设计模型是一个非线性代数方程组,通常需要使用数值迭代方法进行求解。 www.dictall.com 1. Maxwell's equations actually tell you about div and curl of these fields. 实际上,Maxwell方程组,描述了这两个场的旋度和散度。 open.163.com 2. By test, the variations calculated with the equations are in conformity with the actual values and can be used in engineering calculation. 经验证,该式计算的空拔壁厚变化量与实际值基本一致,可用于工程计算。 www.chemyq.com 3. It is sometime necessary to have the stresses at directions other than those given by the equations. 有时需要求与公式所定的方向不同时的应力。 www.jukuu.com 4. The solution is verified with a numerical example, its results without extraneous roots agree with the original equations. 文中给出了一数字实例,经验算其解满足原始方程且无增根。 dictsearch.appspot.com 5. The whole flow is divided into three different regions, each being subject to a treatment by the basic aerodynamic flow equations . 将叶栅的整个区域分为三个流动区域并应用流体力学中的基本方程式分别进行了处理。 dictsearch.appspot.com 6. The global existence and blow up time problem for solutions of a parabolic equations with nonlinear boundary conditions are studied. 研究了一类带有非线性边界条件的非线性抛物型方程组解的整体存在及解在有限时刻爆破问题。 www.ceps.com.tw 7. The fourth one is to determine differential equations which sum functions satisfy, then solve the differential equations. 第四种方法是列写出和函数满足的微分方程,解此微分方程得到和函数。 www.ceps.com.tw 8. The slipper motion equations are established, and the relationship between the time constant of the motor and the displacement is given. 本文分析了十字滑块运动方程,指出了电机通电时问与滑块位移之间存在的对应关系。 www.ceps.com.tw 9. The imaginary inputs satisfying all the compatibility equations are the true kinetostatics parameters. 满足所有相容性方程的虚拟赋值变量的值即为其真实值。 www.fabiao.net 10. The description of a plane wave diffracted by a circular aperture is directly started from the Maxwell's equations. 平面波经圆孔光阑衍射的表征是直接基于麦克斯韦方程组。 www.opticsjournal.net 1. These equations may be used for heavy oil reservoir in development design and evaluation. 这些公式可较好地用于稠油油藏的开发设计评价中。 www.chemyq.com 2. And that's exactly what you see comes out of these equations whether you go to the center of mass or whether you do it from 26. 100. 这就是你们看到的,从这两个方程里得到的,无论是质量重心,还是在26。100做实验。 open.163.com 3. With the symmetry applied to the solution process, the matrix equations were simplified, and the amount of calculation was reduced greatly. 将物体的对称性应用到求解过程中,从而简化了矩阵方程,大大节约了计算量和计算时间。 www.boshuo.net 4. For the case of sinusoidal pulsation, the linear equations have been solved. 并针对压力钢管一端有压力脉动的情况进行了线性化求解; www.ilib.cn 5. Even if there is only one, unique set of possible laws, it is only a set of equations. 即便只有一套独特的可能存在的法则,它也只是一套等式。 www.bing.com 6. The sets of nonlinear synthesis equations are solved by using chaos optimization method, and a numerical example is given for illustration. 运用混沌分形方法求出了综合方程组全部解,并给出了一个数字实例。 www.ceps.com.tw 7. Function to calculate the Jacobian matrix for a set of nonlinear algebraic equations. A simple central differencing scheme is used. 用来计算一套非线性代数方程的雅可比矩阵。使用一个简单微分方法。 dictsearch.appspot.com 8. Mathematical equations are used to fit the experimental data if the mechanical models have not been clearly invented. 在没有获得力学模型之前,可以利用数学公式拟合试验数据。 www.rockmech.org 9. This means that the empirical equations cannot be raised into an universal abstract form by themselves. 这意味着那些经验等式不能被它自己提升到一种普适的形式。 www.sciencenet.cn 10. Compressible miscible displacement in porous medium is modeled by a nonlinear system of two coupled partial differential equations. 在油藏数值模拟中,多孔介质可压缩可混溶驱动问题的数学模型是由两个非线性抛物方程耦合而成。 www.ceps.com.tw 1. Consider the chemical reactions described earlier. Word equations are a useful way of describing these chemical reaction. 考虑到先前描述过的化学反应,方程式是描述这些化学反应的一种有用的方式。 www.jukuu.com 2. Due to the complexity of the nonlinear partial differential equations, the matching conditions simplified and solved. 由于该匹配条件是难于求解的非线性偏微分方程,进一步研究了匹配条件的简化和求解方法。 www.fabiao.net 3. It includes basic information, thermodynamic and thermophysical properties and temperature-dependent correlation equations. 其中包括基本信息、热力学性质、热物理性质等以及与温度的关联式。 epub.cnki.net 4. Add Zeeman coupling to external magnetic field, , and obtain Bloch equations as a saddle point approximation to this path integral. 对外磁场加入塞曼耦合,并得到作为该路径积分的鞍点近似的布洛赫方程。 www.myoops.org 5. The OCP is governed by a set of nonlinear partial differential equations and involves control constraints. 该最优问题受非线性偏微分方程组支配,并且带有控制约束。 www.ceps.com.tw 6. For your enjoyment, the Wired Science team has gathered nine of our favorite equations. 为了让您也能体会到这种美妙,《连线科学》团队收集了九个我们最爱的方程式。 www.bing.com 7. The equations can be used to calculate the solubility parameters of alkyd resin prepared from various plant oils and polyols. 这组方程式可用于估算各种多元醇和不同植物油作原料制备的醇酸树脂的油度和其溶解度的关系。 www.ceps.com.tw 8. In besides, The series equations about transformer-core arc snubber operation also is derived and analyzed on the basis of a ideal model. 除此之外,还在建立理想模型的基础上,对缓冲器的作用机理进行了推导和分析。 paper.pet2008.cn 9. The nonlinear motion equations of the systems are derived and the journal orbits are determined as aPProximate solution of those equations. 推导出了系统的非线性运动方程,所求方程的近似周期解即为轴心轨迹。 dictsearch.appspot.com 10. Using maximum principle and mountain pass lemma to a class of nonlinear elliptic equations, two different positive solutions are obtained. 利用极值原理和山路引理,讨论了一类非线性椭圆[型]方程正解的多重性,得到了两个不同的正。 tech.zidian8.com 1. Relations between physical quantities are usually given in the form of equations. 物理量之间的关系通常用公式表示。 www.choicebest.cn 2. The nonlinear complementarity problem can be reformulated as the solution to a nonsmooth system of equations with FB-NCP function. 利用FB-NCP函数将非线性互补问题转化为等价的非光滑方程组来求解。 www.ceps.com.tw 3. They exist in solutions to Einstein's equations, and are thought to be extremely unstable, and would instantly fall apart once created. 它们存在于爱因斯坦方程式解里,并且被认为极端地不稳定,且一经产生即刻瓦解。 www.chinaufo.com 4. Derive and the equations of motion for a multibody dynamic system and apply the equations in a simulation of limb motion. 为多体动力学系统推出运动的公式,运用公式于肢体的运动仿真。 www.myoops.org 5. Numerical solution of these equations yields the intensity factors and the energy release rate at the crack tip. 求解这些方程组,获得了裂纹尖端的强度因子和能量释放率。 www.dictall.com 6. RARELY has a report with so many charts and equations in it caused such a stir. 鲜有一份充满表格和公式的报告能够激起如此大的波澜。 www.ecocn.org 7. Two are still unemployed which basically means that getting a girlfriend will prove to be difficult given the current equations. 两个仍然没有工作,按照当前的标准,这基本上就意味着是找一个女朋友将很困难。 dongxi.net 8. The equations describing these curves are known as Bezier curves or paths, named after the mathematician Pierre Bezier. 描述曲线的表达式称为Bezier曲线或路径,这个名称源自数学家PierreBezier。 www.ibm.com 9. On the contrary, only through calculate a set of linear algebraic equations can obtain the explicit composite Lyapunov function. 这种方法只需通过计算代数方程就可以求出系统的复合李雅普诺夫方程。 www.fabiao.net 10. The remaining four parameters can be calculated by solving a special set of linear equations. 其余四个参数可以通过解一组特殊的线性方程而计算出来。 bbcpda.com 1. The field equations of his theory of relativity imply that a large star or cloud of gas would collapse in on itself and form a black hole. 他的相对论中域方程解出来的结果就是,大型恒星或者空间气团会被自身的引力塌陷而形成黑洞。 www.bing.com 2. a condition specified for the solution to a set of differential equations. (数学)解一组微分方程的规定条件。 www.1stenglish.com 3. The integral equations for determining the unknown forces can be transformed into algebraic equations and solved numerically. 然后可将定解积分方程组转化为线性代数方程组并计算求解。 www.boshuo.net 4. This can take the form of prototypes, mathematical equations, or interaction diagrams. 可以采用原型、数学方程或者交互式图表的形式。 www.ibm.com 5. In this paper the computational techniques for the approximative solution of equations are discussed, and a practical method is given. 讨论计算方程近似解的一些技术问题,给出了一种实用方法。 www.dictall.com 6. Therefore, these equations with vanishing body forces cannot admit plane wave solutions under an arbitrary initial state of stress. 因此,这些方程当彻体力为零时,在任意的初始胁强状态下并不具备平面波解。 7. Also, we study the existence of global attractors for a class of semilinear hyperbolic equations. 同时,我们也研究了一类半线性双曲方程全局吸引子的存在性。 www.fabiao.net 8. This led physicists to think that the equations of the subatomic world would not look the same if time were reversed . 这使得物理学家们认为,如果时间被反转,亚原子世界的方程式将有所不同。 www.bing.com 9. The energy integral and cyclic integral are involved in the first integration of the Lagrange's equations for a potential system. 保守系统拉格朗日方程的首次积分包括:能量积分、循环积分。 jpkc.qust.edu.cn 10. The solvability of such equations in space L2(G) is solved by means of utilizing the normal solvability of integral operator. 利用积分算子的正规能解性,解决了该类方程在L2(G)中的可解性问题。 www.dictall.com 1. Remarks on the Paper "The Extinction Behavior of the Solutions for a Class of Reaction-Diffusion Equations" 关于“一类反应扩散方程解的熄灭现象”一文的注记 scholar.ilib.cn 2. Finally, it is presented that the error distribution of the roots from complex coefficient higher-order algebraic equations is not even. 算法给出的复系数高次代数方程的根的误差分布不太均匀,个别根精度太高或者太低。 www.ceps.com.tw 3. A set of nonlinear equations of precise synthesis of each linkage are established. 建立了各机构运动综合的非线性方程组。 www.fabiao.net 4. A class of singularly perturbed initial boundary value problems for reaction diffusion equations in a part of domain are considered. 讨论一类在部分区域上的奇摄动反应扩散方程初始边值问题。 www.dictall.com 5. Like most books on control system design, this book presents tools that can be reduced to mathematical equations: analysis and simulation. 像大多数关于控制系统设计的课本一样,这本书主要讲了一些能够被简化为数学等式的工具:分析以及模拟。 zhidao.baidu.com 6. A transient process simulation model with open structure can be obtained from the above voltage equations and magnetic linkage equations. 用磁链方程和电压方程可构成具有开放结构的多分支同步发电机瞬变过程的仿真模型。 www.ilib.cn 7. Linear differential equations are, generally speaking, among the simplest to solve. 一般说来,线性微分方程属于解起来最简单的一种。 yeebang.com 8. The inverse transfer function matrix of attitude dynamics is derived from the hybrid coordinates equations, and its normality is analyzed. 由混合坐标方程导出姿态动力学逆传递函数矩阵,并分析其正规性。 www.acabice.cn:8080 9. In this paper we consider the singularly perturbed boundary value problems for a class of quasilinear difference equations. 本文考虑一类拟线性奇异摄动差分方程的数值解法。 www.ceps.com.tw 10. In this paper, two equations which can be used to fit the efficiency curves of coaxial Germanium detectors are introduced. 作者研究了两类关于同轴锗探测器全能峰效率曲线的拟合公式。 www.dictall.com 1. Many practical problems in engineering and science can be classified as inverse problems of partial differential equations. 在科学和工程技术中,许多实际问题归结为求解偏微分方程的反问题。 www.fabiao.net 2. This paper establishes an extended system of a system of differential equations by introducing some supplementary variables. 通过引进辅助变量的方法建立微分方程组的扩充系统。 www.dictall.com 3. The generalization is quite similar to the corresponding one in the theory of differential equations. 这一推广和对应的微分方程中理论的推广相当类似。 www.jukuu.com 4. Assume the parameter uncertainty is norm-bounded and the system dynamic is modeled by Ito-type stochastic differential equations. 假设参数不确定性是范数有界的并且系统的动态方程是由伊藤微分方程所描述的。 www.ceps.com.tw 5. Engineering geometric constraint problem is equivalent to the problem of solving a set of nonlinear equations substantially. 工程几何约束问题等价于求解一系列非线性方程组。 www.jukuu.com 6. Based on the force transferring through the components, mathematical equations among the related dimensions are derived. 藉由转轴组成元件力的传递,推导出尺度间的数学关系式。 140.118.33.11:8080 7. This paper introduces a simple solution to the homogeneous linear difference equations with constant coefficients. 本文将给出一个十分简明而有效的常系数齐次线性差分方程组的新求解方法。 www.ceps.com.tw 8. In natural science and engineering technology, the resolutions of many problems are reduced to solving linear algebraic equations. 在自然科学和工程技术中,很多问题的解决最后都归结为解线性代数方程组。 zhidao.baidu.com 9. Using energy equations the characteristic equations are established, which are the energy characteristic model of gear trains. 并基于运动方程和转矩方程建立混合轮系的能量状态方程,实现混合轮系的能量特征建模。 paper.pet2008.cn 10. In this paper, we consider the anti-periodic boundary value problem for a class of nonlinear second order differential equations. 在这篇文章中,我们考虑了一类非线性二阶常微分方程反周期边值问题。 www.ceps.com.tw 1. condition of a kind of jump Vandermonde matrix through linear equations, and recursion formula and the expression of its inverse Matrix. 利用线性方程组给出了一类跳行范德蒙矩阵可逆的条件,并给出了逆矩阵的递推公式和逆矩阵的显式表示式。 dict.kekenet.com 2. Matrix differential equations appear frequently in a wide variety of models in physics and engineering. 矩阵微分方程经常出现在一系列物理模型和工程模型中。 www.fabiao.net 3. Time-dependent electromagnetic fields and Maxwell's equations. Electromagnetic waves, emission, absorption, and scattering of radiation. 时变电磁场与马克思威尔方程式、电磁波、电磁辐射特性(发射,吸收及散射)。 www.bistu.edu.cn 4. The dynamic model of the system is developed, and the numerical results of the dynamic equations are obtained. 建立考虑阻尼的二自由度非线性产品包装系统模型,得到冲击动力学方程并数值求解。 www.ceps.com.tw 5. The oscillation of ordinary differential equation is one of important branche of Differential equations. 常微分方程解的振动性是微分方程解的重要性态之一。 word.hcbus.com 6. The dynamic equations of a human body and a railway vehicle are setup based on study on human body vibration model. 在人体振动模型研究基础上,建立了人体轨道车辆运动方程。 www.dictall.com 7. The experimental results were verified by using computer simulation through the rate equations of passively Q-switched laser. 作者从理论上,通过调Q速率方程进行模拟计算,验证了实验结果; www.fabiao.net 8. It is only in the mysterious equations of love that any logic or reasons can be found. 只有在这种神秘的爱情方程中,才能找到逻辑或原由来。 www.kekenet.com 9. There have been many studies of continuous epidemic model through differential equations, but little research on discrete models. 用微分方程建立连续型传染病模型的研究较多,但是研究离散模型的较少。 stae.com.cn 10. The cut joints constraint equations are founded and a new direct violation correction method is utilized. 本文着重讨论了切割铰约束方程的建立和直接违约校正方法。 www.ilib.cn 1. A set of non-linear network equations of the multi-branch complex network system is established by using a mesh method. 采用网孔法建立了多分支复杂网络系统的非线性网络方程组。 www.ceps.com.tw 2. Separable variables are a special class of first order differential equations, which has a wide range of uses in practice. 可分离变量的一阶微分方程是一类特殊的一阶微分方程,它在实际中有着广泛的用途。 lib.cqvip.com 3. The dynamic model of the system was developed, and the numerical results of the dynamic equations were gained. 建立二自由度非线性产品包装系统模型,得到冲击动力学方程并采用数值方法求解。 www.ceps.com.tw 4. The researchers showed how the equations describing fluid flow in the rock always contain a mathematical instability. 研究者展示了在岩石中描述流体运动的方程总是有着数学上的不确定。 www.bing.com 5. According to electromagnetic theory of waveguides, the coupled-mode equations for the interactions between the modes are deduced. 根据光波导中的电磁场理论,推导了经典的耦合模方程。 www.13191.com 6. As well as the traditional topics of analysis and differential equations, the degree offers newer topics as well. 除了传统的解析和微积分公式等主题之外,这个学位还提供更新的主题。 zhidao.baidu.com 7. The approximate numerical method to deal with the coupled mode equations is presented in detail and the rationality of the method is given. 详细地给出耦合模方程近似处理的方法,并说明了其合理性。 www.magsci.org 8. A new pattern of structures, combined isolation structure, was presented, and its vibration and control equations were derived. 提出了一种新的结构体系-组合隔震结构体系,并推导了振动及控制方程。 www.ceps.com.tw 9. It might ask you to just set up the equations, or it might ask you to solve them. 可能只会要你列出方程,也可能是叫你解出方程。 open.163.com 10. We will focus on some problems for the existence and non-existence of solutions for a class of nonlinear elliptic equations. 在此论文中,我们研究了一类非线性椭圆方程解的相关问题。 202.119.108.211 1. It is only in the mysterious equations of love that any logic reason can be found. 只有在神秘的爱的方程里,我们才能发现所有的逻辑和推理。 blog.sina.com.cn 2. The assumed linearity of these equations can be related to the uniformity of space and time. 所假定的这些方程的线性,可归因于空间和时间的均匀性。 www.jukuu.com 3. his primary research is nonlinear partial differential equations , in particular , equations arising from physical and biological sciences. 他的主要研究是非线性偏微分方程,特别是由物理和生物科学衍生的方程式。 www.ichacha.net 4. For the next four decades, no scientist could find an exact solution to the equations. 在接下来的四十年中,没有一个科学家能对这些等式做出精确解。 www.bing.com 5. An example shows that some of these results have important applications in difference equations. 并给出一个例子,说明其中有些结果在差分方程中有重要的应用。 dictsearch.appspot.com 6. Onedimensional partial parabolic equations can be solved by high precision integration method. 一维抛物型偏微分方程可以用精细积分方法精确求解。 tech.zidian8.com 7. Objectives and Assumptions of Linear Regression, Estimating Regression Coefficients, Normal Equations. 线性规划的假设与目的,规划估计,系数,标准方程。 www.myoops.org 8. The Laguerre spectral and pseudo spectral methods for multiple-dimensional nonlinear partial differential equations are investigated. 研究多维区域中非线性偏微分方程的谱与拟谱方法。 www.dictall.com 9. These leveraging equations describe how the two types of leverage affect book rates of return on equity. 这两个槓杆方程式描写两种槓杆如何影响帐簿资产净值回报率。 www.douban.com 10. Many problems in the engineering practice may be transformed as boundary value problems about elliptic differential equations. 工程实际中的许多问题均可转化为椭圆型微分方程边值问题。 paper.pet2008.cn 1. spurious unstable modes are avoided by choosing available form of stability equations in the present research. 为避免出现伪不稳定模态,选择了合适的稳定性方程组形式。 hkxb.buaa.edu.cn 2. In this paper, a parallel iterative algorithm for linear equations is given by approximating inverse of a matrix. 文章利用近似逆矩阵构造了一类求解线性方程组的并行迭代算法。 www.dictall.com 3. The Existence of viscosity solutions of initial problem is proved for second order parabolic equations under certain conditions. 证明了在一定条件下二阶抛物型方程的初值问题的粘性解的存在性。 www.dictall.com 4. Firstly, the directional-lateral motion equations and transfer functions suited for the certain third generation fighter were deduced . 首先推导了适用于某第三代超声速战斗机横航向运动方程和传递函数。 dictsearch.appspot.com 5. Moreover, the corresponding velocity equations of hydraulic characteristic flows are deduced with certain simplification. 在一定的简化条件下,推导了斜槽区水力学特征流动的速度分布表达式。 www.ceps.com.tw 6. a scheme of diagrammatic representation of fundamental dependent equations relating thermodynamic functions is suggested. 通过多年教学实践,归纳出热力学函数间基本关系式的图示法。 www.showxiu.com 7. By iterating or repeating fractal-generating equations many times random outputs create beautiful patterns that are unique yet recognizable. 通过多次迭代或反复分形生成方程,随机输出就可以产生独特且可识别的漂亮图案。 www.chinaen.org 8. Then the stress-strain and mixed fluid pressure can be computed by mixed fluid continuity equations and balanced equations. 联立平衡方程和混合流体的连续方程,求出应力-应变和混合流体压力; www.ceps.com.tw 9. Method of substitution of constants is an important method for solving nonhomogeneous linear differential equations. 常数变易法是求解非齐线性微分方程(组)的一种重要方法。 tech.zidian8.com 10. True, he minimises the use of equations and has dreamt up some imaginative metaphors to help make complex notions more accessible. 诚然,他尽量避免谈及质能方程,并杜撰了一系列富有想象力的隐喻使得那些复杂的概念更易于理解。 www.ecocn.org 1. In this paper, the interval wavelets methods of differential and integral equations are studied and a series of results are obtained. 本文对微积分方程的区间小波方法进行了研究,得到一系列结果。 www.fabiao.net 2. By these equations, the air temperature within greenhousein different season can be estimated and analyzed. 利用该组方程可以对各季日光温室内的气温进行估算分析。 www.magsci.net 3. Two-dimensional, steady-state axial momentum equations were solved with a two-layer turbulence model. 使用两层湍流模型对稳态轴向动量方程进行了数值求解。 www.boshuo.net 4. At last, this scheme is used for constructing an adaptive orthonormal collocation method for differential equations. 最后将该格式用于构造求解微分方程的自适应正交配置算法。 www.ceps.com.tw 5. The stable temperature field of the spindle system was rebuilt through solving the heat balance equations by MATLAB. 通过MATLAB求解热平衡方程组,计算出主轴系统的稳态温度场分布; www.cmemo.org.cn 6. We shall now formulate these integral equations and discuss some of their consequences. 现在我们来表述这些积分方程,并讨论它们的一些结果。 dict.veduchina.com 7. In this paper, we discuss the boundary value problems for a class of second order functional differential equations. 本文讨论了一类二阶泛函微分方程边值问题。 www.ceps.com.tw 8. Needless to say, the method of integral equations and the Green's function technique can also be developed. 无庸赘言,也可以发展积分方程法或格林函数技术。 9. The solution procedures for nonlinear equilibrium equations in structural analysis were systematically summarized. 系统地分析了结构分析中各类非线性方程组的求解方法。 www.boshuo.net 10. Secondly, the component structural model is proposed, which consists of dynamic differential equations and interface algebraic equations. 接着建立了由动态微分方程与接口代数方程组成的结构化模型。 www.dictall.com |
随便看 |
|
英汉双解词典包含2704715条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。