理论和实践的区别在于，理论上，理论和实践没有区别，但在实践中，却有区别。
The difference between theory and practice is that in theory, there is no difference between theory and practice, but in practice, there is.
The world is a better place with your art in it.
The art of acting is the art of listening.
The most effective debugging tool is still careful thought, coupled with judiciously placed print statements.
美德是通过努力获得的，这完全取决于你自己。
自动机和形式语言的研究对于理解计算的极限是基础性的。