You'd better use sunscreen 15 to 30 min. before going outside.

每次外出前，最好提前15到30分钟涂好防晒霜。

youdao

You'd better use sunscreen 15 to 30 min. before going outside.

每次外出前，最好提前15到30分钟涂好防晒霜。

youdao