​protect from 和 protect against 用法区别，英语短语怎么用？

protect from 和 protect against 用法区别，英语短语怎么用？

protect the environment 保护环境

1) protect 保护 可以不跟 from 或 against, 例如，

My prime concern is to protect my property.

我最关心的是保护我的财产。

We have a moral obligation to protect the environment.

我们有道义责任保护环境。

2) protect 保护 跟 from, 表示 保护…免受…之害，from 来自，例如，

The walls were strengthened to protect them from collapse.

围墙已加固以防倒塌。

The body has natural defence mechanisms to protect it from disease.

人体对疾病具有天然的防御机制。

3) protect 保护 跟 against, 表示 防止，防御，against 以防，制止，阻止，例如，

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。

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。