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A
[eɪ] [eɪ]

  • n. 英语字母表的第1个字母;A音;A类;干线公路;最高收入群体;第一列;第一已知量;表层土壤;A型血;A型号纸;A字形
  • abbr. 安培(ampere);A纸牌(ace);……比……(against)

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 ; 无伴奏

A little 一点 ; 一些 ; 一点儿 ; 一点点

hypervitaminosis a 维生素A过多症

a rabbit 一只兔子

 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 /ə/ (also a)

  • 1. 

    N-VAR A is the first letter of the English alphabet. 英语字母表中第1个字母

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  • 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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