We can’t ignore the economic role of coal, but we also can’t ignore its environmental impact.

Innovation in oil extraction isn't optional—it's essential for meeting the world's energy demands.

永远不要停止学习。当你认为自己无所不知时，就是你失败的时候。

学习数学的唯一方法就是做数学。

美不是事物本身的品质：它存在于凝视它们的头脑中。

Don't think. Thinking is the enemy of creativity. It's self-conscious and anything self-concious is lousy. You can't try to do things. You simply must do things.