The joy of solving a mathematical problem is unparalleled; it is a moment of pure intellectual triumph.

循环经济为我们的行业提供了自我革新的巨大机遇。

"Books are the keys to the universe."

"Writing is the art of listening to the whispers of the universe."

I always tell my students that it's okay to make mistakes, as long as you learn from them.

I was so much older then, I'm younger than that now.

Don't search for defining moments because they will never come. The moment that define you have already happened, and they will already happen again.