种一棵树最好的时间是20年前，其次是现在。

Mathematics is not just a tool; it is a way of thinking.

I hear music in everything.

The realization that electronic properties can be topologically protected has revolutionized our understanding of solid-state physics.

未经测试的程序是无法正常工作的。

不要让任何人告诉你你做不到某件事。