1.介词+名词
above all首先,毕竟
after a while过了一会,不久
after all终于,毕竟;虽然这样
ahead of time提前
(a) round the clock昼夜不停地
as a matter of fact其实,事实上
as a result结果,因此
as a result of由于……的结果
as a rule通常,照例
as follows如下
as regards关于,至于
at (the) best充其量,至多
at a loss困惑,不知所措
at a time每次,一次
at all完全,根本
at all costs不惜任何代价
at all events无论如何
at any rate无论如何,至少
at first sight乍一看,初看起来
at hand在手边,在附近
at heart在内心;实质上
at home在家,在国内;自在,自如
at intervals不时,时时
at last最终,终于
at least至少,最低限度
at length终于,最后;详细地
at no time从不,决不
at once立刻,马上
at one time同时,曾经,从前曾
at present目前,现在
at random随意地,任意地
at stake在危险中,利害攸关
at the cost of以……为代价
at the mercy of在……支配下
at the moment现在,此刻
at (the) most最多,至少,不超过
at the same time但是,然而
at times有时
at work在工作,忙于
by accident偶然
by all means无论如何,必定
by chance偶然,碰巧
by comparison比较起来
by contrast比较起来
by hand用手
by heart牢记,凭记忆
by itself独自,单独
by means of借助于,用
by mistake错误地
by no means决不
by oneself独自地,单独地
by reason of由于
by the w
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