before

Wash your hands thoroughly before you start preparing the meal.

(Chinese) 在开始准备饭菜之前，请彻底洗手。

I had never seen such a beautiful sunset before I visited Hawaii.

(Chinese) 在去夏威夷之前，我从未见过如此美丽的日落。

The nervous student stood before the principal's office door.

(Chinese) 那个紧张的学生站在校长办公室门前。

The vast ocean lay stretched out before the exhausted sailors.

(Chinese) 辽阔的大海展现在疲惫的船员们面前。