我从未能写出一部快乐的戏剧。我不能。我可以写一部有趣的戏剧，但我不能写一部快乐的戏剧。

We kid ourselves if we think that the ratio of procedure to data in an active data-base system can be made arbitrarily small or even kept small.

Friends always come and go, but a champion flag will never fall.

学习新编程语言的唯一方法就是用它编写程序。