common sense

US /ˈkɑː.mən ˌsens/
UK /ˈkɑː.mən ˌsens/
"common sense" picture
1.

常识, 判断力

good sense and sound judgment in practical matters.

:
Use your common sense to solve the problem.
用你的常识来解决问题。
It's just common sense to wear a helmet when cycling.
骑自行车戴头盔是常识