"I believe that as much as you take, you have to give back."

有时候生活会用砖头打你的头，但不要失去信心。

These are the times that try men's souls.

Climate change isn’t a distant problem—it’s here, and forests are our first line of defense.

历史是一个庞大的预警系统。

Natural gas will play a critical role in the energy mix as we move toward a lower-carbon future.

I don't want to be a hero. I want to be a human.

一个词的意义在于它在语言中的使用。