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1·The policemen went through that house with a fine-tooth comb.

警察仔细地搜查过那座房子。

2·Go over your finished rough draft with a fine-tooth comb and clean it up as much as you can.

把你完成的稿子用一个”细齿梳子“来检查，尽可能”打扫干净“。

3·Before you sign this contract, I would go over it with a fine-tooth comb if I were you. Make sure it's what you want.

我要是你的话，在签订本合同之前会仔细调查一下，确保符合自己的要求。