preventive

Taking vitamins is a preventive measure to help your body fight off common colds during the winter.

(Chinese) 服用维生素是一种预防性措施，有助于你的身体在冬天抵御普通感冒。

The airline performs preventive maintenance on all its planes to ensure passenger safety.

(Chinese) 航空公司对所有飞机进行预防性维护，以确保乘客安全。