宇宙是一个充满惊喜的地方，我们才刚刚开始理解它的奥秘。

沉没成本

我不相信传统意义上的和谐。我相信强度。

War is an ugly thing， but not the ugliest of things: the decayed and degraded state of moral and patriotic feeling which thinks that nothing is worth a war， is much worse.

I have always preferred working on concrete problems rather than abstract theories.

我们要做的不是跟随，而是引领。