The power of abstraction is what allows mathematics to transcend the limits of physical reality.

我们这个时代的挑战是在不伤害地球的情况下利用能源。

The truth is, we all suffer, but we suffer differently.

"You have to believe in yourself when no one else does—that makes you a winner right there."

最深刻的理论往往源于最简单的观察。