我们不是在说教，我们只是想传授。

Perhaps as important is the relation between the existence of solutions to a competitive equilibrium and the problems of normative or welfare economics.

The most important property of a program is whether it accomplishes the intention of its user.

我不是出生，我是重生。

Sun don't shine forever, but as long as it's here then we might as well shine together.

浪费是一种设计缺陷。