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BNC: 22 COCA: 22
atprepositionukweak /ət/ ukstrong /æt/ usweak /ət/ usstrong /æt/

at preposition PLACE

A1 used to show an exact position or particular place（表示地点或位置）在…里；在…上；在…旁

We'll meet you at the entrance.我们会在入口处跟你碰头。
That bit at the beginning of the film was brilliant.电影开头的那一段精彩极了。
She's sitting at the table in the corner.她坐在角落的一张桌子旁。
She was standing at the top of the stairs.她在楼梯顶端站着。
The dog came and lay down at (= next to) my feet.这只狗过来趴在我的脚边。
There's someone at the door (= someone is outside and wants to come in).有人敲门。
We spent the afternoon at a football match.我们下午去看了场足球比赛。
I enjoyed my three years at university.我在大学度过了3年美好的时光。
I called her but she was at lunch (= away, eating her lunch).我打电话给她，但是她出去吃午饭了。

More examples

Security checks have become really strict at the airport.

She works on the checkout at the local supermarket.

The two vans collided at the crossroads.

Why wasn't Stephen at the meeting, then?

Turn left at the traffic lights, and you'll see the hospital straight ahead.

at preposition TIME

A1 used to show an exact or a particular time（表示确切或某一时间）在…时刻；在…期间；在…岁时

There's a meeting at 2.30 this afternoon.今天下午两点半有个会。
Are you free at lunchtime?吃午饭的时候你有空吗？
In theory, women can still have children at the age of 50.理论上说，妇女到了50岁仍可以生育。
The bells ring at regular intervals through the day.在一天中，这些钟每隔一段时间就会准时鸣响。
At no time/point did the company do anything illegal.这家公司从未做过任何违法的事情。
I'm busy at the moment (= now) - can you call back later?我现在很忙，你过一会儿再打回来行吗？
It's a shame I wasn't here to meet you - I was overseas at the time (= then).真可惜那次我不在，没有见到你——那时我在国外呢。

More examples

People in Britain legally reach adulthood at 18.

Rioters hurled rocks and petrol bombs in clashes with police at the weekend.

My last class ends at 4 o'clock.

I always like to leave my desk clear at the end of the day.

I was married with four children at your age.

at preposition DIRECTION

A1 in the direction of对着…；朝着…

She smiled at me.她对我微笑了一下。
They waved at us as we drove by.我们驱车经过时，他们朝我们挥手。
She aimed at the target.她瞄准目标。
"Look at me! Look at me!" called the little girl.“看看我！看看我！”那个小女孩叫道。
He's always shouting at the children.他老是冲着孩子们大喊大叫。

More examples

The old man clenched his fist and waved it angrily at us.

She could no longer contain her anger and shouted at him uncontrollably.

The talks are aimed at finding a mutually agreeable solution.

She darted an angry look at me and I shut up.

He fired six shots at the target, but his aim was terrible, and he missed all of them.

at preposition CAUSE

A2 used to show the cause of something, especially a feeling（尤指感觉是）由于，因为，作为对…的反应

We were surprised at the news.我们听到这个消息很吃惊。
I was quite excited at the prospect.想到这种前景，我激动不已。
Why does no one ever laugh at my jokes?为什么我讲了笑话，从来就没人笑呢？

More examples

There was a chorus of disapproval at his words.

It was a courageous decision to resign in protest at the company's pollution record.

He looked very disappointed at their decision, but did not argue.

I cringed at the sight of my dad dancing.

We were all delighted at the news.

at preposition ACTIVITY

B1 used to show the activity in which someone's ability is being judged在…方面

I was never very good at sports.我从来都不太擅长体育运动。
He's very good at getting on with people.他很善于跟人打交道。
She's hopeless at organizing things.她办什么事情都没有条理，简直不可救药。

More examples

I'm not much good at knitting .

Dave is normally very bad at remembering birthdays.

I expected her to be better at French after studying it for so many years.

Your mother's really brilliant at Scrabble.

You're even worse at maths than I am!

at preposition EMAIL ADDRESS

A1 the @ symbol that joins the name of a person or a department in an organization to a domain name to make an email address（电子邮件地址中的）符号@

"What's your email address?" "It's dictionary at cambridge dot org."“你的电邮地址是什么？”“是 dictionary@cambridge.org。”

More examples

Granddad wrote 'at' in the address instead of the @ symbol - that's why it didn't work.

Where is the key for 'at' on this keyboard?

You missed out the @ in your email address.

Hold down the shift key, otherwise you will type an inverted comma instead of an 'at' sign.

Alternatively, you can email your order to directcustserve@cambridge.org.

at preposition AMOUNT

B2 used to show a price, temperature, rate, speed, etc.（表示价格、温度、比率、速度等）以，达

I'm not going to buy those shoes at $150!那么一双鞋要150美元，我才不会买！
Inflation is running at 5 percent.通货膨胀率达到5%。
He was driving at 120 mph when the police spotted him.当警察发现他时，他正以120英里的时速行驶。

usually @ used in financial records to show the price, rate, etc. of a particular thing or of each of a number of things on a list（用于财务记录中表示某一项目的价格、比率等的）符号@

50 units @ £4.7550件，每件4.75英镑

More examples

The costs of cleaning up the bay are estimated at $1 billion.

We sell a wide range of cosmetics and toiletries at a very reasonable price.

When you buy a new computer, you usually get software included at no extra cost .

With inflation at 500%, the country faces a crisis of confidence.

Water boils at 212° Fahrenheit and 100° Celsius/Centigrade.

at preposition CONDITION

used to show a state, condition, or continuous activity（表示状态、状况或连续的活动）处于；从事于；忙于

a country at war处于战争状态的国家
children at play玩耍的孩子们

More examples

He felt completely at ease.

He says he's at peace when he's walking in the mountains.

Your father is hard at work in his study.

They've been at war for the last five years.

Of the ten men who escaped this morning from Dartmoor Prison, only two are still at liberty .

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