94生活常识网有道词典

at

A 开头单词四级词汇专八核心词高考词汇词源字典

音标发音

  • 英式音标 [æt; ət]
  • 美式音标 [æt,ət]
  • 英式发音
  • 美式发音

基本解释

  • prep. 在（表示存在或出现的地点、场所、位置、空间）；在……岁时；在……远；以（某种价格、速度等）；向，朝；处于……状态；处于最佳（或最差等）状态；达；因为；在……方面；响应；忙于；（武器）瞄准；用，以；（抓）住；从事于；冲 (某人……)
  • n. 阿特（老挝货币基本单位 att）；砹（极不稳定放射性元素）
  • abbr. 密封的 (airtight)；大气 (atmosphere)；原子的 (atomic)；气温 (air temperature)

词源解说

  • 直接源自古英语的at；最初源自原始印欧语的ad，意为靠近，在……附近。

同根派生

  • at

用法辨析

  • in与at的比较：用于地方时，at指较小的地方，如指城镇时，in指较大的地方，用于省、国家、大陆前。国际大都市前用at 和in都有，但在London前通常用in。在指说话人的住处时要用in，且一般in表示实在的存在，而at却不是。说到某大城市的某大建筑物，往往在大城市名称的前面用at，如the Pantheon at Rome。说到商店、机关、学校等，假使看作一个地点（point)用at。假使看作一个场所(place)用in，the barber's (理发店），Green's (Green所开的店）等前面只用at，不用in。说到门牌用at，如live at 1184 Zhongshan Road，路名前面该用in，而说“在……路口”用at；
  • 用于时间时，可表示时刻，如at night，at three o'clock，at dawn，at any time等。也可表示较短的时期，如at night，at the beginning of the month等，其中at night表示时刻时意为“在薄暮”，表示较短的时期时意为"在夜里"，通常指黄昏或上半夜；
  • at用于信封地址前可指“转交”。Mike at 99 Zhongshan Road Shanghai. Mike经常不在上海中山路99号，请予以转交。
  • at用于一些动词后面表示某种情绪、非语言交流或攻击性行为，如smile at me，point at me，shout at you等；
  • arrive后面一般都接in或at，而不接to，如When did you arrive in New Zealand?而不是to New Zealand；
  • at five years old和at five miles distant里用at，可改作at five years of age或at the age of five years和at five miles' distance，这种用法较为普遍。

英汉例句

    用作介词 (prep.)

  • He was not at his office.
    他不在办公室。

词组短语

    用作介词 (prep.)

    动词+～

  • arrive at 到达
  • assist at 参与
  • bark at the moon 空嚷
  • bay at the moon 不断无谓地抱怨
  • be at sb 's door （责任等）归于某人；（某事）是某人的责任

英英字典

    剑桥英英字典

  • (PLACE) used to show an exact position or particular place
  • (TIME) used to show an exact or a particular time
  • (DIRECTION) in the direction of
  • (CAUSE) used to show the cause of something, especially a feeling
  • (ACTIVITY) used to show the activity in which someone's ability is being judged
  • (EMAIL ADDRESS) the @ symbol that joins the name of a person or a department in an organization to a domain name to make an email address
  • (AMOUNT) used to show a price, temperature, rate, speed, etc.
  • (CONDITION) used to show a state, condition, or continuous activity

    • 柯林斯英英字典

  • You use at to indicate the place or event where something happens or is situated.
  • If you are at something such as a table, a door, or someone's side, you are next to it or them.
  • 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.
  • If something happens at a particular time, that is the time when it happens or begins to happen.
  • If you do something at a particular age, you do it when you are that age.
  • If someone is at a particular school or college, they go there regularly to study.
  • You use at to express a rate, frequency, level, or price.
  • You use at before a number or amount to indicate a measurement.
  • If you look at someone or something, you look toward them. If you direct an object or a comment at someone, you direct it toward them.
  • 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 that someone is meant to see or understand.
  • 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.
  • If you are working at something, you are dealing with it. If you are aiming at something, you are trying to achieve it.
  • If something is done at someone's invitation or request, it is done as a result of it.
  • You use at to say that someone or something is in a particular state or condition.
  • 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.
  • You use at to say how something is being done.
  • You use at to show that someone is doing something repeatedly.
  • You use at to indicate an activity or task when saying how well someone does it.
  • You use at to indicate what someone is reacting to.
  • a Laotian monetary unit worth one hundredth of a kip 1001
  • Austria
  • at all&rarrsee all

专业释义

    数学

  • 单价

    • 电子、通信与自动控制技术

  • 异步传输 (asynchronous transmission)
  • 异步传输法
  • 非同步传输 (asynchronous transmission)
  • 安匝
  • 安
  • 业馀电台

    • 计算机科学技术

  • 验收测试 (acceptance test)
  • 存取时间 (access time)
  • 会计制表 (accounting tabulating)
  • 交叉磁带 (across tape)
  • 作用时间 (action time)
  • 加法器树 (adder tree)
  • 位址转译器 (address translator)
  • 位址翻译器
  • 先进技术 (advanced technology)
  • 权限表 (authority table)
  • 安培匝 (ampere turn)
  • 异常传输 (anomalous transmission)
  • 自动电话 (automatic telephone)
  • 自动订票 (automatic ticketing)
  • 自动打字机 (automatic typewriter)
  • 辅助计时器 (auxiliary timer)

    • 医药科学

  • 共济失调毛细血管扩张症 (ataxia telangiectasia)