| 单词 | tighten up |
| 释义 | tighten up tighten (sth) up — phrasal verb with tighten /ˈtaɪ.tən/ verb [I or T] ► F0 to make a rule, system, or law stronger and more difficult to avoid or ignore: » Are there any plans to tighten up on advertising controls?Thesaurus+: ↑Becoming and making stronger |
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