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 reg