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

爱就是冒着受伤的风险，而不爱则是保证了一生的虚度。

I don’t regret anything I’ve ever done in my life, because it made me who I am today.

You’ve got to have models in your head. And you’ve got to array your experience—both vicarious and direct—on this latticework of models. You may have noticed students who just try to remember and pound back what is remembered. Well, they fail in school and in life. You’ve got to hang experience on a latticework of models in your mind.

不要让别人意见的噪音淹没了你内心的声音。