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1. How do we know you're not just covering up for your friend?

我们怎么知道你不只是在为自己的朋友遮掩呢？

2. Social science is a collective name, covering a series of individual sciences.

社会科学是一个统称，涵盖一系列的独立学科。

3. He must make a decent living from other artists covering his songs.

其他艺术家翻唱他的歌曲，一定使他过上了收入颇为可观的生活。

4. Applicants are asked to send in a CV and a covering letter.

申请人需要提交一份简历和附函。

5. The rules covering eligibility for benefits changed in the 1980s.

20世纪80年代，有关救济金领取资格的规定变了。