The happiness of a married man depends on the people he has not married.
"We don't see things as they are, we see them as we are."
我们来狂欢我们来狂欢
对任何模型的最大期望是它能提供一个对现实有用的近似。
我不是因为快乐而歌唱，我歌唱是因为我快乐。