关于理论最重要的事情是它应该是可测试的。

我们没有要求人们放弃任何东西，我们是在给他们更好的选择。

I'm not afraid to take a stand. Everybody, come take my hand. We'll walk this road together, through the storm, whatever weather, cold or warm.

We must listen to indigenous knowledge—they've been the guardians of forests for centuries.

过去总是紧张的，未来是完美的。