a waste of money/time/… 浪费(金钱、时间等)
a year and a half 一年半
above all 最重要的是，首先要
according to 根据、依照
achieve one's aim/goal 实现某人的目标
achieve success 取得成功
act a part ①扮演一个角色 ②假装
act as if 假装(接从句，有虚拟语气)
act the part of sb. 演……的角色
add A to B 把A加到B上
add to 增加到
add up to 总计(无被动形式)
address a/the letter 写信(的地址)
address sth. to sb. 给某人讲……
admit to 承认
advise (that) sb. (should) do 建议某人应该做某事(虚拟语气)
advise sb. to do 劝说某人去做
afford sb. sth. 为某人承担……
afford sth. to sb. 为某人承担……
afford to do 能够去做
after a time 一段时间后
after a while 不久
after all 毕竟;终究
