20. 第二十篇 Why Should We Protect the Environment (上) 讲解音频

第二十篇     Why Should We Protect the Environment? (上)

It is important to protect the environment because man-made disruptions to ecosystems can cause extinction and because pollution creates dangers for both animals and people.

开头句型: It is important to protect the environment 保护环境很重要

句型：it is important to do sth 做什么很重要