- the lowest cardinal number; half of two;1一; 一个：
there's only room for one person
只有一个人的空间
two could live as cheaply as one
两个人的生活可以过得像一个人一样便宜
one hundred miles
100英里
World War One
第一次世界大战
a one-bedroom flat.
单间卧室的公寓。
(Roman numeral: i, I. 罗马数字： i, I.)
- a single person or thing, viewed as taking the place of a group一个人; 一个东西：
they would straggle home in ones and twos.
他们或单独或两人结伴稀稀拉拉地走回家。
- single; just one as opposed to any more or to none at all (used for emphasis)唯一, 单一：
her one concern is to save her daughter.
她唯一关心的就是救她女儿。
- denoting a particular item of a pair or number of items（两个或几个中的）一个：
electronics is one of his hobbies
电子是他的兴趣之一
he put one hand over her shoulder and one around her waist
他把一只手放在她肩上, 另一只手搂着她的腰
a glass tube closed at one end.
一头封闭的玻璃试管。
- denoting a particular but unspecified occasion or period（某）一个（场合或阶段）：
one afternoon in late October.
10月末的一个下午。
- used before a name to denote a person who is not familiar or has not been previously mentioned; a certain某位（用于人名前表示不熟悉或之前没有提过）：
he worked as a clerk for one Mr Ming.
他替某位明先生当文员。
- informal, chiefly N. Amer. a noteworthy example of (used for emphasis)〈非正式, 主北美〉一个典范（用于强调）：
the actor was one smart-mouthed troublemaker
那个演员真是一个伶牙俐齿又爱惹是生非的人
he was one hell of a snappy dresser.
他绝对是个衣着入时的人。
- identical; the same相同的：
all types of training meet one common standard.
各种训练都要达到一个相同的标准。
- identical and united; forming a unity同一个; 一体的：
the two things are one and the same.
这两个东西是完全一样的。
- W. Indian alone〈西印度〉单独：
the time when you one tackled a field of cane and finished before the others had even started.
你独自应付一片甘蔗地, 还要在别人开始之前就完成的那个年代。
ORIGIN: a use recorded in Old English, becoming obsolete in standard use in the mid 16th cent.
- one year old一岁。
- one o'clock一点钟：
it's half past one
现在是一点半
I'll be there at one.
我一点钟会到那儿。
- informal an alcoholic drink〈非正式〉一杯酒：
a cool one after a day on the water.
在水上忙碌一天之后一杯清凉的酒。
- informal a joke or story〈非正式〉一个玩笑; 一个故事：
the one about the Englishman, the Irishman, and the Yank.
那个关于英国人、爱尔兰人和美国佬的故事。
- a size of garment or other merchandise denoted by one（衣服等商品的）一号。
- a domino or dice with one spot一点的多米诺骨牌; 一点的骰子。
- referring to a person or thing previously mentioned那个人; 那个东西：
her mood changed from one of moroseness to one of joy
她的心情从郁闷变得欢快
her best apron, the white one.
她最好的围裙, 白色的那条。
- used as the object of a verb or preposition to refer to any example of a noun previously mentioned or easily identified［用作动词或介词的宾语, 指代前面出现过或易于确定的一个名词］一个; 一份：
they had to buy their own copies rather than waiting to borrow one
他们得自己买几本, 而不是等着借一本
do you want one?
你想要一个吗？
- a person of a specified kind（特指的）那种人：
you're the one who ruined her life
你就是那种毁了她生活的人
Eleanor was never one to be trifled with
埃莉诺绝不是那种可以小看的人
my friends and loved ones.
我的朋友和我挚爱的人们。
- a person who is remarkable or extraordinary in some way突出的人; 特别的人：
you never saw such a one for figures.
你从没见过一个在数字方面如此突出的人。
- third person singular used to refer to any person as representing people in general（泛指）一个人; 任何人：
one must admire him for his willingness.
任何人肯定会为他的积极肯干而敬佩他。
- referring to the speaker as representing people in general我们：
one gets the impression that he is ahead.
我们会有种他在前面的印象。
at one
- in agreement or harmony适应; 协调; 一致：
they were completely at one with their environment.
他们完全适应了环境。
for one
- used to stress that the person named holds the specified view, even if no one else does仅就（某人）来看; 举个例说：
I for one am getting a little sick of writing about it.
就我而言, 我开始有点厌恶写它了。
get something in one
- informal understand or succeed in guessing something immediately〈非正式〉理解正确, 猜测正确。
have one over the eight
- 见EIGHT.
one after another（或the other）
- following one another in quick succession一个接着一个地：
one after another the buses drew up.
公共汽车一辆接一辆地停下来。
one and all
- everyone每个人：
well done one and all!
大家都做得很好！
one and only
- unique; single (used for emphasis or as a designation of a celebrity)唯一的; 单个的：
the title of his one and only book
他唯一的一本书的名字
the one and only Muhammad Ali.
独一无二的穆罕默德·阿里。
one by one
- separately and in succession; singly一个一个地; 逐一地。
one day
- at a particular but unspecified time in the past or future一天, 有一天：
one day a boy started teasing Grady
一天, 一个男孩开始取笑格雷迪
he would one day be a great President.
他有一天会成为一位伟大的总统。
one for one
- denoting or referring to a situation or arrangement in which one thing corresponds to or is exchanged for another一对一：
these donations would be matched on a one-for-one basis with public revenues.
这些捐款将会与公共收入一对一匹配。
one of a kind
- 见KIND1.
one on one（或one to one）
- denoting or referring to a situation in which two parties come into direct contact, opposition, or correspondence面对面地：
maybe we should talk to them one on one.
或许我们应该和他们当面谈谈。
- one-to-one Mathematics in which each member of one set is associated with one member of another【数】一一对应（法则）。
one or another（或the other）
- denoting or referring to a particular but unspecified one out of a set of items一系列事物中的某一个; 这个或那个：
not all instances fall neatly into one or another of these categories.
不是所有的情况都可清楚地归于这些类别中的某一类。
one or two
- informal a few〈非正式〉一些：
there are one or two signs worth watching for.
有一些值得注意的标记。
one thing and another
- informal used to cover various unspecified matters, events, or tasks〈非正式〉这样那样的事（泛指许多事情）：
what with one thing and another she hadn't had much sleep recently.
她最近因为这样那样的事情而睡得不多。