世界就是所有实际情况。

广义相对论是所有现有物理理论中最美的。

The writer must believe that what he is doing is the most important thing in the world. And he must hold to this illusion even when he knows it is not true.

"In the long run, the only sustainable source of competitive advantage is your ability to learn faster than your competition."

随机实验是因果推理的黄金标准，但它们并不总是可行的。

生产的最终条件是生产条件的再生产。