他已经学会了如何处理小的危险，如何保护环境。

He has learned how to deal with small dangers and how to protect the environment.

youdao

我刚刚读了一本书，书中给了我们如何保护环境的建议。

I've just read a book which gives ideas about how we can protect the environment.

youdao

For example, how cancer diagnosis has improved, what are some of the causes of cancer in the environment around us and how can we protect ourselves from it, and we'll talk about treatments for it as well.

例如癌症的诊断手段是如何进步的,我们周围环境中有哪些致癌因素,以及我们如何保护自己免受其害,我们也会讨论到癌症的治疗手段

耶鲁公开课 - 生物医学工程探索课程节选