我不能教会别人任何事。我只能让他们思考。
I cannot teach anybody anything。I can only make them think.
有的人忙着死，有的则人忙着活。
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
软件工程的目标是生产可靠、可维护和高效的软件系统。