That's why, as we get ready to celebrate the 40th anniversary of Earth Day, I want to leave you with a challenge.

这就是为什么，当我们准备庆祝地球日40周年时，我想给你们一个挑战。

youdao

That's why, as we get ready to celebrate the 40th anniversary of Earth Day, I want to leave you with a challenge.

这就是为什么，当我们准备庆祝地球日40周年时，我想给你们一个挑战。

youdao