Everyone has the brainpower to follow the stock market. If you made it through fifth-grade math, you can do it.

种一棵树最好的时间是20年前，第二好的时间就是现在。

I think that the role of the mathematician is to discover these patterns and to explain them.

I'm the reason your wind won't blow.

The dinosaurs became extinct because they didn't have a space program. And if we become extinct because we don't have a space program, it'll serve us right!

在代数中，两个量的相等性通过方程来表达。

失败只是通往成功的垫脚石。