A1 the number 1(数字)1
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Trouble broke out in the match when one of the players called a member of the other team a cheat.
They've got two adopted children and one of their own.
He is one of the top chefs in Britain.
When one engine stopped, we had to turn round and fly home.
Would you run your idea by me one more time?
Four parcels came this morning, but only one was for Mark.
Paint one side, leave it to dry, and then paint the other.
He can't tell one wine from another, so don't give him any of the expensive stuff.
A2 a member of a group of people or things(一群人或事物)中的一个,之一
B2 used to refer to a time in the future that is not yet decided(用于指将来某个未确定的时间)某一
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You're going to get into serious trouble one of these days.
Let's go to the cinema one night next week.
One of these days we're going to move to France.
Come and visit one weekend.
One day we'll be able to afford a car like that.
B2 used to refer to a particular occasion while avoiding stating the exact moment某一天;某一刻;某一次
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At one point Seeger fell afoul of the US government for his antiwar actions.
He managed to eke out a living one summer by selling drinks on a beach.
They met in Paris one enchanted afternoon in early autumn.
I suspected he wasn't telling me the truth, and one day I caught him out when I found some letters he'd written.
We met one day last year when we got talking in a bar.
B2 a single thing; not two or more单独一个;一个
C2 combined in a single person or object集于一体,合为一体;兼具
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With one blow of the knight's axe, he clove the rock in twain.
Only one competitor made a clear jump of the highest fence.
Don't let one little quarrel come between you.
I took one look at her and cracked up.
The canteen is the one thing I'll miss about work.
B2 used when saying there is no other person or thing唯一的一个
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The one thing that's certain is that prices will go up.
He was the one person to complete the test with no mistakes.
She's the one person I can trust around here.
It is the one thing I regret about my time at the company.
The one thing he's not prepared to compromise is his family's safety.
formal used before the name of someone who is not known(用于不认识的人的名字前)某一个
mainly US used to emphasize an adjective(用于强调形容词)一个
A2 used to refer to a particular thing or person within a group or range of things or people that are possible or available(一群人或一批东西中的)一个
to never do something从来不做
to like something very much热衷于,喜爱
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That's one classy vehicle you've got there.
You can always tell a real bow tie from one that clips on.
She's written five books, and every one a cracker.
Mrs. Wilson is one of our regular customers.
I really must get a new jacket - this one's starting to go at the elbows.
used to talk about one person or thing compared with other similar or related people or things(表示与另一类似或相关的人或物相对照的)一个
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During the night, he had rolled from one side of the bed to the other.
The two cultures were so utterly disparate that she found it hard to adapt from one to the other.
If I have to listen to something I don't understand, it just goes in one ear and out the other.
The two sisters are so similar that it's almost impossible to tell one from the other.
This film begins where the other one leaves off.
C1 formal any person, but not a particular person任何人;一个人
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One's primary responsibility is to the legal system.
One must not assume from this that the defendant is guilty.
I wondered whether there might, after all, be some truth in the old chestnut that one's school days are the happiest of one's life.
Yoga is said to restore one's inner equilibrium.
Spending time with one's family is never an unalloyed pleasure.
formal the person speaking or writing(讲话者或笔者用于自称)我,本人
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