on account of(=because of)由于，因为.
on no account(=in no case，for no reason)绝不要，无论如何不要(放句首时句子要倒装)
accuse…of…(=charge…with;blame sb. for sth.;blame sth. on sb.;complain about)指控，控告
be accustomed to(=be in the habit of，be used to)习惯于
be acquainted with(=to have knowledge of)了解;(=to have met socially )熟悉
act on 奉行，按照…行动;act as 扮演;act for 代理
adapt oneself to(=adjust oneself to)使自己适应于
adapt…(for)(=make sth. suitable for a new need)改编，改写(以适应新的需要)
in addition(=besides)此外，又，加之
in addition to(=as well as，besides，other than)除…外
adhere to(=abide by，conform to，comply with，cling to，insist on，persist in，observe，opinion，belief)粘附;坚持，遵循
adjacent(=next to，close to)毗邻的，临近的
adjust..(to)(=changes lightly)调节;适应
admit of(=be capable of，leave room for)…的可能，留有…的余地
in advance(before in time)预告，事先
