at

prep.

1. 在（某处）
   used to say where sth/sb is or where sth happens
   1. at the corner of the street
      在街角
   2. We changed at Crewe.
      我们在克鲁换的车。
   3. They arrived late at the airport.
      他们晚到了机场。
   4. At the roundabout take the third exit.
      在环岛处走第三个出口。
   5. I'll be at home all morning.
      我一上午都在家。
   6. She's at Tom's (= at Tom's house) .
      她在汤姆家中。
   7. I met her at the hospital.
      我在医院遇见了她。
   8. How many people were there at the concert?
      音乐会上有多少人？
2. 在（学习或工作地点）
   used to say where sb works or studies
   1. He's been at the bank longer than anyone else.
      他在银行工作的时间比任何人都长。
   2. She's at Yale (= Yale University) .
      她在耶鲁大学。
3. 在（某时间或时刻）
   used to say when sth happens
   1. We left at 2 o'clock.
      我们在两点钟离开的。
   2. at the end of the week
      周末
   3. We woke at dawn.
      我们在黎明醒来。
   4. I didn't know at the time of writing (= when I wrote) .
      我写的时候并不知道。
   5. At night you can see the stars.
      夜晚可以看见星星。
   6. What are you doing at the weekend?
      你打算周末干什么？
4. 在…岁时
   used to state the age at which sb does sth
   1. She got married at 25.
      她25岁结的婚。
   2. He left school at the age of 16.
      他16岁便离开学校。
5. 向；朝
   in the direction of or towards sb/sth
   1. What are you looking at?
      你在看什么？
   2. He pointed a gun at her.
      他把枪口对着她。
   3. Somebody threw paint at the prime minister.
      有人朝首相扔油漆。
6. （用于动词后，涉及未做成或未做完的事）
   used after a verb to show that sb tries to do sth, or partly does sth, but does not succeed or complete it
   1. He clutched wildly at the rope as he fell.
      他坠落时拼命想抓住绳子。
   2. She nibbled at a sandwich (= ate only small bits of it) .
      她一小口一小口地吃三明治。
7. 在…远；从相隔…远的地方
   used to state the distance away from sth
   1. I held it at arm's length.
      我伸直胳膊提着它。
   2. Can you read a car number plate at fifty metres?
      在五十米远处你能看清汽车牌吗？
8. 处于…状态
   used to show the situation sb/sth is in, what sb is doing or what is happening
   1. The country is now at war.
      这个国家正在打仗。
   2. I felt at a disadvantage.
      我觉得处于不利地位。
   3. I think Mr Harris is at lunch.
      我想哈里斯先生正在吃午饭。
9. （用于速度、比率等）以，达
   used to show a rate, speed, etc.
   1. He was driving at 70 mph.
      他以每小时70英里的速度驾车行驶。
   2. The noise came at two-minute intervals (= once every two minutes) .
      每两分钟传来一次闹声。
10. 处于最佳（或最差等）状态；在全盛（或谷底等）时期
    used to say that sb/sth is as good, bad, etc. as they can be
    1. This was Henman at his best.
       这是亨曼的最佳表现。
    2. The garden's at its most beautiful in June.
       六月的花园最美丽。
11. （与形容词连用，表示状况）在…方面
    used with adjectives to show how well sb does sth
    1. I'm good at French.
       我的法语很好。
    2. She's hopeless at managing people.
       她对人事管理一窍不通。
12. （与形容词连用）因为，由于，对…
    used with adjectives to show the cause of sth
    1. They were impatient at the delay.
       他们对拖延不耐烦了。
    2. She was delighted at the result.
       对这个结果她感到高兴。
13. 应…（而）；响应；回答
    in response to sth
    1. They attended the dinner at the chairman's invitation.
       他们应董事长之邀出席了宴会。
14. （提供电话号码时用）
    used when giving a telephone number
    1. You can reach me at 637-2335, extension 354.
       你可以打637-2335这个电话号码，转分机354，与我联系。
15. （用于电子邮箱地址中的符号 @）
    the symbol (@) used in email addresses

In addition to the uses shown below, at is used after some verbs, nouns, and adjectives to introduce extra information. At is also used in phrasal verbs such as ‘keep on at’ and ‘play at’.
除下列用法外，at用于某些动词、名词、形容词后以引出附加信息。at还可用于keep on at, play at等短语动词中。

1. PREP 在（某地）；在（某场合）
   You use at to indicate the place or event where something happens or is situated.
   1. We had dinner at a restaurant in Attleborough...
      我们在阿特尔伯勒的一家餐厅里吃的饭。
   2. He will be at the airport to meet her...
      他将去机场接她。
   3. I didn't like being alone at home...
      我不喜欢一个人呆在家里。
   4. Hamstrings are supporting muscles at the back of the thigh...
      腿筋是位于大腿后侧起支撑作用的肌肉。
   5. The announcement was made at a news conference.
      这项声明是在新闻发布会上宣布的。
2. PREP 在（上学）
   If someone is at school or college, or at a particular school or college, they go there regularly to study.
   1. He was shy and nervous as a boy, and unhappy at school...
      他小时候既害羞又胆怯，在学校过得并不快乐。
   2. It was at university that he first encountered Hopkins...
      他第一次遇见霍普金斯是在上大学的时候。
   3. I majored in psychology at Hunter College.
      在亨特学院求学时，我主修心理学。
3. PREP 在…旁边；靠近
   If you are at something such as a table, a door, or someone's side, you are next to it or them.
   1. An assistant sat typing away at a table beside him...
      助手坐在他身旁的一张桌子上埋头打字。
   2. Graham was already at the door...
      格雷厄姆已经在门口了。
   3. At his side was a beautiful young woman...
      他旁边是个年轻漂亮的女子。
   4. He gave the girl at the desk the message.
      他把便条递给了桌旁的女孩。
4. PREP 从相隔（一段距离）的地方;呈…角度
   When you are describing where someone or something is, you can say that they are at a certain distance. You can also say that one thing is at an angle in relation to another thing.
   1. The two journalists followed at a discreet distance...
      那两个记者谨慎地保持距离跟在后面。
   2. The tree was leaning at a low angle from the ground.
      那棵树倾斜得非常厉害。
5. PREP 在（某时间或时刻）
   If something happens at a particular time, that is the time when it happens or begins to happen.
   1. The funeral will be carried out this afternoon at 3.00...
      葬礼将在今天下午3点举行。
   2. He only sees her at Christmas and Easter.
      他只有在圣诞节和复活节时才能见到她。
6. PREP 在（某一年龄时）；在…岁时
   If you do something at a particular age, you do it when you are that age.
   1. Blake emigrated to Australia with his family at 13...
      布莱克在13岁时随家人移民到了澳大利亚。
   2. Mary Martin has died at her home in California at the age of seventy-six.
      玛丽·马丁76岁时卒于加利福尼亚家中。
7. PREP 以，达（某一速度、频率、水平或价格）
   You use at to express a rate, frequency, level, or price.
   1. I drove back down the highway at normal speed...
      我以正常车速沿公路返回。
   2. Check the oil at regular intervals, and have the car serviced regularly...
      定期检查汽油，并对车辆进行定期维护。
   3. The submarine lies at a depth of 6,000 feet in the Barents Sea.
      潜艇位于巴伦支海水下6,000英尺深处。
   4. ...custom-designed rugs at $16 to $100 a sq ft.
      价格在每平方英尺16至100美元不等的定制地毯。
8. PREP 以，达（某一数量）
   You use at before a number or amount to indicate a measurement.
   1. Weighing in at eighty tons, the B-19 was easily the largest and most sophisticated warplane in the world.
      B-19重达80吨，无疑是世界上最大、最先进的军用飞机。
   2. ...as unemployment stays pegged at three million.
      当失业人数维持在300万
9. PREP 朝（某人或某物看）；向（某人掷物）；冲（某人说话）
   If you look at someone or something, you look towards them. If you direct an object or a comment at someone, you direct it towards them.
   1. He looked at Michael and laughed...
      他看着迈克尔笑了。
   2. The crowds became violent and threw petrol bombs at the police...
      人群变得狂暴起来，并向警察投掷汽油弹。
   3. A couple of people started shouting abuse at them as they walked past a pub.
      当他们经过一个酒吧时，有几个人开始朝他们谩骂。
10. PREP 向，朝（某人微笑、招手等）
    You can use at after verbs such as 'smile' or 'wave' and before nouns referring to people to indicate that you have put on an expression or made a gesture which someone is meant to see or understand.
    1. She opened the door and stood there, frowning at me...
       她打开门站在那里，朝我皱着眉头。
    2. We waved at the staff to try to get the bill.
       我们向工作人员招了招手，想要买单。
11. PREP （指）向…
    If you point or gesture at something, you move your arm or head in its direction so that it will be noticed by someone you are with.
    1. He pointed at the empty bottle and the waitress quickly replaced it...
       他指了指空瓶子，女服务员立即重新拿了一瓶。
    2. He gestured at the shelves. 'I've bought many books from him.'
       他指着书架说，“我已经从他那里买了不少书了”。
12. PREP 致力于;定位于;期望达到
    If you are working at something, you are dealing with it. If you are aiming at something, you are trying to achieve it.
    1. She has worked hard at her marriage.
       她努力维系着她的婚姻。
    2. ...a $1.04m grant aimed at improving student performance on placement examinations.
       旨在提高学生编班考试成绩的104万美元拨款
13. PREP 应（某人邀请或要求）
    If something is done at someone's invitation or request, it is done as a result of it.
    1. She left the light on in the bathroom at his request...
       她按照他的要求将浴室里的灯开着。
    2. I visited Japan in 1987 at the invitation of the Foreign Minister.
       应日本外相的邀请，我于1987年访问了日本。
14. PREP 处在…状态
    You use at to say that someone or something is in a particular state or condition.
    1. I am afraid we are not at liberty to disclose that information...
       恐怕我们无权透露这一信息。
    2. Their countries had been at war for nearly six weeks.
       他们的国家陷入战争状态已将近6个星期了。
15. PREP （用于所有格代词和形容词最高级前，表示某人或某物在此时的某一特征最鲜明）
    You use at before a possessive pronoun and a superlative adjective to say that someone or something has more of a particular quality than at any other time.
    1. He was at his happiest whilst playing cricket...
       玩板球时他最开心了。
    2. Howards End is old fashioned film-making at its best.
       《霍华德庄园》是一部经典的老派电影。
16. PREP 以…方式
    You use at to say how something is being done.
    1. Three people were killed by shots fired at random from a minibus...
       3个人被从一辆面包车中发射的乱弹打死了。
    2. Mr Martin was taken out of his car at gunpoint.
       马丁先生被人用枪指着从车里带了出来。
17. PREP （表示某人重复做某事）
    You use at to show that someone is doing something repeatedly.
    1. She lowered the handkerchief which she had kept dabbing at her eyes...
       她放下了那块一直用来擦眼睛的手帕。
    2. Miss Melville took a cookie and nibbled at it.
       梅尔维尔小姐拿起一块饼干小口吃起来。
18. PREP 在…方面（擅长）
    You use at to indicate an activity or task when saying how well someone does it.
    1. I'm good at my work...
       我对自己的工作得心应手。
    2. Robin is an expert at cheesemaking...
       罗宾是奶酪制作专家。
    3. She excels at sport.
       她擅长体育运动。
19. PREP 对…的反应
    You use at to indicate what someone is reacting to.
    1. Eleanor was annoyed at having had to wait so long for him...
       埃莉诺为不得不等他这么长时间而感到很恼火。
    2. The British team did not disguise their delight at their success...
       英国队毫不掩饰他们获胜的喜悦。
    3. Six months ago she would have laughed at the idea.
       要是在6个月前，她会对这个想法嗤之以鼻。
20. at all → see: all

1. We had dinner at a restaurant in Attleborough
   我们在阿特尔伯勒的一家餐厅里吃的饭。
2. He will be at the airport to meet her
   他将去机场接她。
3. I didn't like being alone at home
   我不喜欢一个人呆在家里。
4. Hamstrings are supporting muscles at the back of the thigh
   腿筋是位于大腿后侧起支撑作用的肌肉。
5. The announcement was made at a news conference.
   这项声明是在新闻发布会上宣布的。
6. He was shy and nervous as a boy, and unhappy at school
   他小时候既害羞又胆怯，在学校过得并不快乐。
7. It was at university that he first encountered Hopkins
   他第一次遇见霍普金斯是在上大学的时候。
8. I majored in psychology at Hunter College.
   在亨特学院求学时，我主修心理学。
9. An assistant sat typing away at a table beside him
   助手坐在他身旁的一张桌子上埋头打字。
10. Graham was already at the door
    格雷厄姆已经在门口了。
11. At his side was a beautiful young woman
    他旁边是个年轻漂亮的女子。
12. He gave the girl at the desk the message.
    他把便条递给了桌旁的女孩。
13. The two journalists followed at a discreet distance
    那两个记者谨慎地保持距离跟在后面。
14. The tree was leaning at a low angle from the ground.
    那棵树倾斜得非常厉害。
15. The funeral will be carried out this afternoon at 3.00
    葬礼将在今天下午3点举行。
16. He only sees her at Christmas and Easter.
    他只有在圣诞节和复活节时才能见到她。
17. Blake emigrated to Australia with his family at 13
    布莱克在13岁时随家人移民到了澳大利亚。
18. Mary Martin has died at her home in California at the age of seventy-six.
    玛丽·马丁76岁时卒于加利福尼亚家中。
19. I drove back down the highway at normal speed
    我以正常车速沿公路返回。
20. He looked at Michael and laughed
    他看着迈克尔笑了。
21. She opened the door and stood there, frowning at me
    她打开门站在那里，朝我皱着眉头。
22. He pointed at the empty bottle and the waitress quickly replaced it
    他指了指空瓶子，女服务员立即重新拿了一瓶。
23. She has worked hard at her marriage.
    她努力维系着她的婚姻。
24. She left the light on in the bathroom at his request
    她按照他的要求将浴室里的灯开着。
25. I am afraid we are not at liberty to disclose that information
    恐怕我们无权透露这一信息。
26. He was at his happiest whilst playing cricket
    玩板球时他最开心了。
27. Three people were killed by shots fired at random from a minibus
    3个人被从一辆面包车中发射的乱弹打死了。
28. She lowered the handkerchief which she had kept dabbing at her eyes
    她放下了那块一直用来擦眼睛的手帕。
29. I'm good at my work
    我对自己的工作得心应手。
30. Eleanor was annoyed at having had to wait so long for him
    埃莉诺为不得不等他这么长时间而感到很恼火。

prep.

at that

• （提供额外信息时）而且还
  used when you are giving an extra piece of information
  1. He managed to buy a car after all─and a nice one at that.
     他终于设法买了一辆小轿车——而且还挺不错的。

be at it again

• 正在做某事（尤指坏事）
  to be doing sth, especially sth bad
  1. Look at all that graffiti─those kids have been at it again.
     瞧瞧所有的那些涂鸦——又是那些孩子干的好事。

where it's at

• 盛大活动（场合）；流行活动（地方）
  a place or an activity that is very popular or fashionable
  1. Judging by the crowds waiting to get in, this seems to be where it's at.
     从等待入场的人群来看，这好像是个盛大活动。

noun

1. 100 at equal 1 kip in Laos