tighten up

phrasal verb

tighten up (on something) | tighten something up

to become stricter or more careful; to make something become stricter变得更加严格（或小心）
- 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。
- The regional government has tightened up the country's lax planning laws.地方政府收紧了该国宽松的规划法。

词汇	tighten up
释义	tighten up phrasal verb tighten up (on something) \| tighten something up to become stricter or more careful; to make something become stricter变得更加严格（或小心） 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。 The regional government has tightened up the country's lax planning laws.地方政府收紧了该国宽松的规划法。
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