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  1. Oxford Dictionary

    A

    • IPA[eɪ]

    英式

    • n.
      the first letter of the alphabet.；denoting the first in a set of items, categories, sizes, etc.

    • noun: A, plural noun: A's

    • 釋義
    • 相關詞
    • 片語

    名詞

    • 1. the first letter of the alphabet.
    • ▪ denoting the first in a set of items, categories, sizes, etc.
    • ▪ denoting the first of two or more hypothetical people or things suppose A had killed B
    • ▪ the highest class of academic mark a dazzling array of straight A's
    • ▪ (in the UK) denoting the most important category of road, other than a motorway the A34 busy A-roads
    • ▪ denoting the highest-earning socio-economic category for marketing purposes, including top management and senior professional personnel.
    • ▪ denoting the first file from the left, as viewed from White's side of the board.
    • ▪ the first constant to appear in an algebraic expression.
    • ▪ denoting the uppermost soil horizon, especially the topsoil.
    • ▪ the human blood type (in the ABO system) containing the A antigen and lacking the B.
    • ▪ (with numeral) denoting a series of international standard paper sizes each twice the area of the next, as A0, A1, A2, A3, A4, etc., A4 being 210 × 297 mm.
    • 2. a shape like that of a capital A an A-shape
    • 3. the sixth note of the diatonic scale of C major. The A above middle C is usually used as the basis for tuning and in modern music has a standard frequency of 440 Hz.
    • ▪ a key based on a scale with A as its keynote.

    a-

    • pref.
      to; toward: aside ashore

    Oxford American Dictionary

    -a

    • suf.
      forming ancient or Latinized modern names of animals and plants: primula

    Oxford American Dictionary

    -a

    • suf.
      forming ancient or Latinized modern names of animals and plants: primula

    Oxford Dictionary

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    片語

    • 更多解釋

    A

    • IPA[ā]

    美式

    • n.
      the first letter of the alphabet.

    Oxford American Dictionary

    A

    • IPA[eɪ]

    英式

    • abbr
      (in card games) ace: you cash ♥AK

    Oxford Dictionary

    a

    • IPA[ə]

    美式

    • dete
      used when referring to someone or something for the first time in a text or conversation. a man came out of the room it has been an honor to meet you

    Oxford American Dictionary

    A

    • IPA[ā]

    美式

    • abbr
      ace (used in describing play in bridge and other card games): you cash AK of hearts

    Oxford American Dictionary

    a

    • IPA[ə]

    英式

    • dete
      used when referring to someone or something for the first time in a text or conversation. a man came out of the room it has been an honour to meet you

    Oxford Dictionary

    a

    • abbr
      (in travel timetables) arrives: Penzance a 0915
    • symbol
      acceleration.

    Oxford American Dictionary