The beauty of mathematics is that it is universal.

I've learned that failure is just part of the process, and you can't let it define you.

"Life is either a daring adventure or nothing at all."

他的美德我都不喜欢。我喜欢的坏他也都没有。

物理学的美在于它能够用简单的定律解释复杂的事物。

种一棵树最好的时间是20年前，第二好的时间是现在。