英语词汇“tighten up”的释义、用法及例句-英汉例句词典-知否

词汇	tighten up
例句	phrasal verb Laws on gambling have tightened up recently. 有关赌博的法律最近变得更加严厉。 The police are tightening up on under-age drinking. 警方正在采取更加严厉的措施对付未成年人饮酒的问题。
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