数学的真正乐趣在于发现的过程，而不仅仅是结果。
Coal’s future depends on our ability to make it cleaner and more efficient.
技术与基础设施的融合势不可挡。
Never a failure, always a lesson.
I don't believe in inspiration, I believe in work.
有些伤口永远不会愈合，只会结痂。
The only purpose for which power can be rightfully exercised over any member of a civilized community， against his will， is to prevent harm to others.
One isn't born one's self. One is born with mass of expectations, a mass of other people's ideas—and you have to work through it all.