common sense

Using common sense, the hiker decided not to climb the mountain without a waterproof jacket.

(Chinese) 凭着常识，徒步者决定在没有防水夹克的情况下不爬山。

It's just common sense to check the expiration date on the milk before drinking it.

(Chinese) 喝牛奶前检查保质期只是基本的常识。