The bags have tough exterior materials to protect against knocks, rain, and dust.

这些袋子结实的外层材料有防撞、防雨、防尘的作用。

Exercise will not only lower blood pressure but possibly protect against heart attacks.

运动不仅会降低血压，而且能防止心脏病发作。

Packed with protein, zinc, magnesium, and selenium, pumpkinseeds help protect against depression and heart disease.

南瓜籽富含蛋白质，锌，镁和硒，有助于预防抑郁症和心脏病。

But how do you protect against human error?

但如何才能避免人为的错误呢？

Myth: Taking vitamins can protect against cancer.

误区4：维生素能对抗癌症。