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N-COUNT
纽孔;扣眼
A buttonhole is a hole that you push a button through in order to fasten a shirt, coat, or other piece of clothing.
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N-COUNT
别在衣服上的花;胸花
A buttonhole is a flower that you wear on your coat or dress.
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VERB
强留(某人)停下来听
If you buttonhole someone, you stop them and make them listen to you.
例句
Several people buttonholed television reporters to explain to them their reasons for not voting.
几个人拉住电视台记者非要向他们解释自己不投票的理由。