a-a big headache 令人头痛的事情 a fraction of 一部分a matter of concern 焦点 a series of 一系列，一连串above all 首先，尤其是 absent from 不在，缺席abundant in 富于 account for 解释 accuse sb of sth 控告add to/add up to 增加 after all 毕竟，究竟 agree with 同意ahead of time/schedule 提前 ahead of 在……之前alien to 与……相反 all at once 突然，同时 all but 几乎；除了 all of a sudden 突然 all over again 再一次，重新 all over 遍及all right 令人满意的；可以 all the same 仍然，照样的all the time 一直，始终 angry with sb at/about sth 生气，愤怒anxious about/for 忧虑，担心 anything but 根本不apart from 除了 appeal to 吸引，申诉，请求 applicable to 适用于apply to 适用 appropriate for/to 合适 approximate to 近似，接近apt at 善于 apt to 易于 around the clock 夜以继日as a matter of fact 实际上 as a result(of) 因此，由于as a rule 通常，照例 as far as ... be concerned 就...而言as far as 远至，到...程度 as follows 如下 as for 至于，关于as good as 和 as if 好像，防腐 as regards 关于，至于as to 至于，关于 as usual 像平常一样，照例 as well as 除as well 同样，也，还 ashamed of 羞愧，害臊aside from 除 ask for the moon 异想天开 at a loss 茫然，不知所措 at a time 一次，每次 at all costs 不惜一切代价at all events 不管怎样，无论如何 at all times 随时，总是at all 丝毫(不)，一点也不 at any rate 无论如何，至少 at best 充其量，至多at first sight 乍一看，初看起来 at first 最初，起先 at hand 在手边，在附近at heart 内心里，本质上 at home 在家，在国内 at intervals 不时，每隔at large 大多数，未被捕获的 at last 终于 at least 至少 at length 最终，终于 at most 至多，不超过 at no time 从不，决不at one time 曾经，一度；同时 at present 目前，现在at someone s disposal 任某人支配 at the cost of 以……为代价at the mercy of 任凭 at the moment 此刻，目...
