我们安装了篱笆以防止狗跑到街上去。

We installed a fence to ___keep the dog ___from wandering into the street.

引人入胜的故事情节让我无法放下这本书。

The engaging storyline ___kept me ___from putting the book down.

强加密能防止黑客访问敏感数据。

Strong encryption ___keeps hackers ___from accessing sensitive data.