a
art.一(个);每一(个);(同类事物中)任一个
释义2:
a
a¹◙ [元音前用 an] , determiner1. used when mentioning someone or something for the first time in a text or conversation• [用于第一次提及某人或某事物] 有个,某个,一个。--› compare
the »a man came out of the room. 一个男人走出了房间。 »it has been an honour to have you. 你能来真是荣幸。 »we need people with a knowledge of languages. 我们需要有语言知识的人。 used with units of measurement to mean one such unit• [与度量单位连用,表示一个单位] 一 »a hundred. 一百。 »a quarter of an hour. 一刻钟。 [with negative] one single; any • 一个,任何一个 »I simply haven't a thing to wear. 我简直没有衣服可穿。 used when mentioning the name of someone not known to the speaker• [用于提及说话者不认识的人] 某一个 »a Mr Smith telephoned. 有个史密斯先生打电话来过。 someone like (the name specified)• [与具体人名连用] 像…的人 »you're no better than a Hitler. 你就像个希特勒。2. used to indicate membership of a class of people or things• [用于表示某一类人或事物] 一个,一 »he is a lawyer. 他是律师。 »this car is a BMW. 这是辆宝马车。3. in, to, or for each; per (used when expressing rates or ratios)• [用于表示速度或比率] 每 »typing 60 words a minute. 每分钟打60个词。 »a move to raise petrol prices by 3p a litre. 将汽油价格每升提高三便士的动议。【语源】
1. Middle English : weak form of Old English ān 'one'【用法】
1. On the question of using a or an before words beginning with h, see usage at an
a²◙ for abbreviation (in travel timetables) arrives• [用于旅行时刻表] 同 arrives »Penzance a 0915. 9点15分到达彭赞斯。• [in combination] (in units of measurement) atto- (10-18)• (度量单位)。 (同 atto- ) [Brit] (with reference to sporting fixtures) away• [英] (比赛的安排)。 (同 away ) »March 15 Sheffield United (a). 设菲尔德联队将于3月15日在客场举行比赛。【Latin】
(used before a date) before• 在…之前(用于日期之前) »a1200. 1200年前。◙ for symbol1. (a)[Physics] acceleration• [物理] 加速度
俄语/英语字母转换