7. be bad for： → be harmful for， be damaging/detrimental /injurious to 对…有害，不利于
【例句】Obscenity is certainly detrimental to the society either it be in the West or in the East.不管在西方还是东方，淫秽肯定对社会有害。
8. because → due/owing to the fact (that) 因为，由于
because of → due/owing to， on account of 因为，由于
【例句】The school's poor exam record is largely due to the fact that it is chronically underfunded. 这个学校糟糕的考试成绩主要是因为其受到长期的投入不足。
9. sb believe → It is sb's belief that ... 某人相信
【例句】 It is his belief that the media can play an important role in helping this investigation reach a positive conclusion. 他相信媒体能在帮助此项调查得到一个正面的结论中担当一个重要角色。
10. best → unparalleled， incomparable， unsurpassed， unrivalled
【用法】当best表示“好的、佳的”时，可以用unparalleled(无与伦比的)、incomparable(不可比拟的)和unsurpassed(不可超越的)等词替换。
11. be busy with sth → be (fully) occupied with sth 忙于某事
be busy doing sth → be (fully) occupied (in) doing sth忙于做某事
【例句】He's fully occupied looking after three small children. 他所有的时间都用来照顾三个小孩子了。
12. buy v. → purchase 购买
【用法】Where did you purchase the book? 你在哪里买到这本书的?
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