人在学习上，如果不每天进步就会每天退步。

Get rich or die trying.

He who knows only his own side of the case knows little of that.

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

有志者，事竟成。

记忆是我们唯一不会被驱逐的天堂。

性别平等的未来取决于拆除可见和不可见的障碍。