单词：tighten up
tighten up的用法和样例：
例句
- He tightened up the rope a little.他把绳子绷紧了一些。
- Shorts that ride up can be very uncomfortable.短裤向上绷紧会使人感到很不舒服。
- We need to tighten up security at the prison.我们必须加强监狱的安全性。
- The pressure on the enemy is building up quickly.对敌人的压力正在迅速加强。
词汇搭配
- tighten up绷紧
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