tighten up
phrasal verbtighten up (on something) | tighten something up
- to become stricter or more careful; to make something become stricter
（使）变得更加严格；更加小心 - 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.
地区政府已收紧国家松散的规划法。
- Laws on gambling have tightened up recently.