Coal has powered our past, but we must be honest about its role in our future.

The truth is rarely pure and never simple.

数学的研究就像空气或重力——它无处不在，即使你看不到它。

"The most important skill for the future is learning how to learn."

数学是一门活生生的学科，随着新思想的出现而不断发展。

形式系统的发展彻底改变了我们对数学的理解。