tighten up

US /ˈtaɪ.tən ʌp/
UK /ˈtaɪ.tən ʌp/
"tighten up" picture
1.

拧紧, 收紧

to make something tighter or more secure

:
Please tighten up the screws on this chair.
请把这把椅子的螺丝拧紧
The regulations need to be tightened up to prevent fraud.
需要收紧法规以防止欺诈。
2.

加强, 改进

to become more disciplined or efficient

:
The team needs to tighten up their defense.
球队需要加强防守。
We need to tighten up our spending habits.
我们需要收紧我们的消费习惯。