有成就感的人会把世界看成一个友好的世界，并乐于看到它照原样保持下去，但失意者却会乐于看到世界急遽改变。

I don't believe in anything, and that's the only thing I believe in.

I love the competition, the challenge, and the fight.

For in the final analysis, our most basic common link is that we all inhabit this small planet. We all breathe the same air. We all cherish our children's futures. And we are all mortal.

计算机科学的挑战在于弥合理论模型与实际应用之间的差距。

当被问及SpaceX连续发生三次故障时