词汇 | tighten sth ↔ up |
释义 | tighten sth ↔ up also 又作 tighten up on sth to make a rule, law, or system stricter 使〔规定、法律或体系〕更严格: They're tightening up the laws on immigration. 他们正逐步把移民法订得更严。 |
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