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A

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  • 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)
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双语例句

  1. They had a butler, a cook, and a maid.
    他们有一位管家、一位厨师和一位女仆。
    来自《柯林斯英汉双解大词典》
  2. "Ha!" It was a cross between a laugh and a bark.
    “哈!”那是一种一半是笑一半是厉声喊叫的混杂声。
    来自《柯林斯英汉双解大词典》
  3. A man in a crash helmet was mounting a motorcycle.
    一个戴着防撞头盔的男子正骑上一辆摩托车。
    来自《柯林斯英汉双解大词典》

网络短语

  • a cappella
    无伴奏合唱;阿卡贝拉;走在大街的女子;无伴奏
  • A-lin
    黄丽玲;给我一个理由忘记;歌手黄丽玲;沈凌
  • 哆啦A梦
    Doraemon;Doraemon Collection;Doraemon Nobita's Dinosaur
  • in a word
    总之;总而言之;简言之;一句话
  • a lot of
    许多;大量;非常;很多

词义分布

94.9%
一项
4.3%
一座
0.2%
一所
0.2%
一间
0.2%
一颗
0.1%

英英释义

  • 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
  • n.any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
  • n.one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
  • n.(biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
  • n.the basic unit of electric current adopted under the Systeme International d'Unites
  • n.the 1st letter of the Roman alphabet
  1. art.
    used before a noun when people may not know which particular person or thing you are talking about
    (非特指的人或事物中的)一个
    • A waiter came in with a glass of water.
      侍者端着一杯水进来了。
    • He started eating an apple.
      他开始吃苹果。
  2. art.
    used when you are talking about any person or thing of a particular type
    (一类人或事物中的)一个,任何一个
    • You should leave it to an expert.
      你应该把它留给专家解决。
    • Bring a sleeping bag.
      带只睡袋。
  3. art.
    used instead of the number 'one' before some numbers or measurements
    (代替数字one,用于某些数字或度量单位之前)一
    • a hundred miles
      100英里
  4. art.
    each; for each
    每;每一
    • Cheryl goes to London three times a month.
      谢里尔每月去伦敦三次。
    • This cheese costs £12.25 a kilo.
      这种奶酪每公斤12.25英镑。

词源

  • a一 (个)
    不定冠词an在发展过程中出现的缩略形式,应用于首字母为辅音的单词及h发音单词。