tighten up

例句：

1. 1.The dress needs to be tightened up a bit.
   这件衣服需要稍微紧一点。
2. 2.He tightened up the belt of his jacket.
   他拉紧了夹克的腰带。
3. 3.She tightened up her seatbelt before taking off.
   她系好安全带才起飞。