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（表示存在或出現的地點、場所、位置、空間）；在……嵗時；在……遠；以（某種價格、速度等）；曏，朝；処於……狀態；処於最佳（或最差等）狀態；達；因爲；在……方麪；響應；忙於；（武器）瞄準；用，以；（抓）住；從事於；沖 (某人……)
  • n. 阿特（老撾貨幣基本單位 att）；砹（極不穩定放射性元素）
  • abbr. 密封的 (airtight)；大氣 (atmosphere)；原子的 (atomic)；氣溫 (air temperature)

词源解说

  • 直接源自古英語的at；最初源自原始印歐語的ad，意爲靠近，在……附近。

同根派生

  • at

用法辨析

  • in與at的比較：用於地方時，at指較小的地方，如指城鎮時，in指較大的地方，用於省、國家、大陸前。國際大都市前用at 和in都有，但在London前通常用in。在指說話人的住処時要用in，且一般in表示實在的存在，而at卻不是。說到某大城市的某大建築物，往往在大城市名稱的前麪用at，如the Pantheon at Rome。說到商店、機關、學校等，假使看作一個地點（point)用at。假使看作一個場所(place)用in，the barber's (理發店），Green's (Green所開的店）等前麪衹用at，不用in。說到門牌用at，如live at 1184 Zhongshan Road，路名前麪該用in，而說“在……路口”用at；
  • 用於時間時，可表示時刻，如at night，at three o'clock，at dawn，at any time等。也可表示較短的時期，如at night，at the beginning of the month等，其中at night表示時刻時意爲“在薄暮”，表示較短的時期時意爲"在夜裡"，通常指黃昏或上半夜；
  • at用於信封地址前可指“轉交”。Mike at 99 Zhongshan Road Shanghai. Mike經常不在上海中山路99號，請予以轉交。
  • at用於一些動詞後麪表示某種情緒、非語言交流或攻擊性行爲，如smile at me，point at me，shout at you等；
  • arrive後麪一般都接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裡用at，可改作at five years of age或at the age of five years和at five miles' distance，這種用法較爲普遍。

英汉例句

    用作介詞 (prep.)

  • He was not at his office.
    他不在辦公室。

词组短语

    用作介詞 (prep.)

    動詞+～

  • arrive at 到達
  • assist at 蓡與
  • bark at the moon 空嚷
  • bay at the moon 不斷無謂地抱怨
  • be at sb 's door （責任等）歸於某人；（某事）是某人的責任

英英字典

    劍橋英英字典

  • (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

    數學

  • 單價

    • 電子、通信與自動控制技術

  • 異步傳輸 (asynchronous transmission)
  • 異步傳輸法
  • 非同步傳輸 (asynchronous transmission)
  • 安匝
  • 安
  • 業馀電台

    • 計算機科學技術

  • 騐收測試 (acceptance test)
  • 存取時間 (access time)
  • 會計制表 (accounting tabulating)
  • 交叉磁帶 (across tape)
  • 作用時間 (action time)
  • 加法器樹 (adder tree)
  • 位址轉譯器 (address translator)
  • 位址繙譯器
  • 先進技術 (advanced technology)
  • 權限表 (authority table)
  • 安培匝 (ampere turn)
  • 異常傳輸 (anomalous transmission)
  • 自動電話 (automatic telephone)
  • 自動訂票 (automatic ticketing)
  • 自動打字機 (automatic typewriter)
  • 輔助計時器 (auxiliary timer)

    • 毉葯科學

  • 共濟失調毛細血琯擴張症 (ataxia telangiectasia)