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a
[ə; eɪ] [ə; e]

  • art. 一;任一;每一

[ 复数 A's或a's或As或as 或 Aes或aes ]

网络释义专业释义英英释义

短语

a cappella 无伴奏合唱 ; 阿卡贝拉 ; 走在大街的女子 ; 无伴奏

A little 一点 ; 一些 ; 一点儿 ; 一点点

Bisphenol A 双酚A ; 酚甲烷 ; 丙二酚

人马座A Sagittarius ; Centaurus ; sgr

FORM A 普惠制产地证 ; 普惠制原产地证明书 ; 普惠证 ; 普惠制原产地证

Easy A 绯闻计划 ; 破处女王 ; 现代红字 ; 容易的

A Tempo 回到原速 ; 回原速 ; 速度还原 ; 原速

hypervitaminosis a 维生素A过多症 ; 翻译 ; 维生素A过多症英语

a rabbit 兔子朱迪 ; 一只小兔子 ; 一只兔子 ; 意为

a priori [数] 先验的 ; 先天的 ; 演绎地

 更多收起网络短语
  • 1a 级(城市或公司债券的等级,低于 2a 级,高于 3b 级)
  • a 型血
    腺嘌呤(adenine)的符号;丙氨酸(alanine)的符号
    腺苷 (adenosine)
    极光激酶A (aurora)
  • 通风巷道,风道
  • (原子)质量数(= mass number)
    埃(angstrom),埃单位(angstrom unit)的符号;亥姆霍兹函数(helmholtz function)的符号
  • 安 (ampere;amp)
  • 安培 (ampere;amp)
    A磁碟机
  • 丙胺酸 (alanine;ala)
    丙氨酸 (alanine;ala)
  • 钾霞橄黄长岩

·2,447,543篇论文数据,部分数据来源于NoteExpress

a [ ei ]

  • n.
    • a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation

      同义词: angstrom angstrom unit

    • any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes

      同义词: vitamin A antiophthalmic factor axerophthol

    • one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)

      同义词: deoxyadenosine monophosphate

    • (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA

      同义词: adenine

    • the basic unit of electric current adopted under the Systeme International d'Unites

      "a typical household circuit carries 15 to 50 amps"

      同义词: ampere amp

    • the 1st letter of the Roman alphabet

      同义词: letter a

    • the blood group whose red cells carry the A antigen

      同义词: type A group A

以上来源于: WordNet

 柯林斯英汉双解大词典 

a /æn, æn/ (also an) CET4

  • 1. 

    DET You use a or an when you are referring to someone or something for the first time or when people may not know which particular person or thing you are talking about. (用于首次提及或泛指某人或某物) 一 (个)

    例:

    A waiter entered with a tray bearing a glass and a bottle of whisky.

    一名服务员端着一个放有一只玻璃杯和一瓶威士忌酒的托盘进来了。

    例:

    He started eating an apple.

    他开始吃苹果。

  • 2. 

    DET You use a or an when you are referring to any person or thing of a particular type and do not want to be specific. 用于指一类人或物,不需要特指

    例:

    I suggest you leave it to an expert.

    我建议你把它留给专家来处理。

    例:

    Bring a sleeping bag.

    带个睡袋来。

  • 3. 

    DET You use a or an in front of an uncount noun when that noun follows an adjective, or when the noun is followed by words that describe it more fully. 一种 (用于前有形容词或后有修饰语的不可数名词前)

    例:

    The islanders exhibit a constant happiness with life.

    这些岛民表现出一种对生活的持久的幸福感。

  • 4. 

    DET You use a or an in front of a mass noun when you want to refer to a single type or make of something. 一种 (用于物质名词前,特指某物的种类或成分)

    例:

    Bollinger "RD" is a rare, highly prized wine.

    是一种罕见的、非常名贵的葡萄酒。

  • 5. 

    DET You use a in quantifiers such as a lot, a little, and a bit. 用在量化词组中,如(a lot), (a little), (a bit##bit)等

    例:

    I spend a lot on expensive jewellery and clothing.

    我在昂贵的首饰和衣服上开销很大。

  • 6. 

    DET You use a or an to refer to someone or something as a typical member of a group, class, or type. 指某人或某物是一个团队、阶层或类型中典型的一员或一部分

    例:

    Some parents believe a boy must learn to stand up and fight like a man.

    一些家长认为一个男孩必须学会像男子汉一样奋起战斗。

  • 7. 

    DET You use a or an in front of the names of days, months, or festivals when you are referring to one particular instance of that day, month, or festival. 用于某一天、某一月份或某节日前,特指在该天、该月或该节日发生的事件

    例:

    The interview took place on a Friday afternoon.

    该面谈是在一个星期五下午进行的。

  • 8. 

    DET You use a or an when you are saying what someone is or what job they have. 用于说明某人的职业

    例:

    I explained that I was an artist.

    我解释说我是一位艺术家。

  • 9. 

    DET You use a or an instead of the number "one," especially with words of measurement such as "hundred," "hour," and "metre," and with fractions such as "half," "quarter," and "third." 一 (代替)(one)

    例:

    ...more than a thousand acres of land.

    …一千多英亩的土地。

  • 10. 

    DET You use a or an in expressions such as eight hours a day to express a rate or ratio. 每一 (用于速率或比率的表达中)

    例:

    Prices start at $13.95 a yard for printed cotton.

    印花棉布开价为$13.95一码。

  • 11. 

    V → an informal or dialect word for have

    例:

    they'd a said if they'd known

  • 12. 

    PREP → (usually linked to the preceding noun) an informal form of of

    例:

    sorta sad

    例:

    a kinda waste

  • 13. 

    SYMBOL for acceleration 加速度

双语例句原声例句权威例句

  • As a doctor, how do you do that?

    作为一个医生 怎么那样?。

    www.engxue.com

  • A Nobel for each and every one of us.

    一个我们一个诺贝尔和平奖

    article.yeeyan.org

  • If you have a system out of service or not.

    如果一个不在工作系统或者工作

    open.163.com

更多双语例句
  • About the size of a small dog, echidnas look like a mixture of a porcupine, an anteater,a pig and a mole.

    VOA: special.2009.07.07

  • It's a ladder used to ascend a tree, it's a kind of tool of ascent that's a kind of a tool for getting fruit.

    这是用来爬上树的梯子,是一种上升的工具,也是用来摘果子的。

    耶鲁公开课 - 现代诗歌课程节选

  • We call it a function. That is to say it has a function; it has a function within our understanding of the way in which a text has structure.

    我们之所以称之为功能是因为它有功能;,我们文本结构的角度,去认识这种功能。

    耶鲁公开课 - 文学理论导论课程节选

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