在观测天文学中，耐心是关键，有些发现需要几十年才能确认。

Envy is a really stupid sin because it’s the only one you could never possibly have any fun at. There’s a lot of pain and no fun. Why would you want to get on that trolley?

The best way to predict the future is to create it.

数学之美在于它能够将复杂的事物简化。