网球是一项心理游戏。每个人都健康，每个人都打出很棒的正手和反手——重要的是头脑。

The theory of computation provides a foundation for understanding what can and cannot be computed.

To be without some of the things you want is an indispensable part of happiness.

Technology itself is neither good nor evil, the key lies in the people who use it.

创新不仅仅是技术的问题；它关乎改变思维方式并接受新的思考方式。