As a precaution, please back up all your files before the system update tonight.

為了以防萬一，請在今晚系統更新前備份所有檔案。

The airline asked passengers to arrive early as a safety precaution during the holiday rush.

航空公司要求旅客在連假尖峰期間提早抵達，作為安全預防措施。

Our warehouse staff must take every precaution when loading fragile items onto delivery trucks.

我們的倉儲人員將易碎品裝上貨車時，必須做好一切防範措施。