Perhaps as important is the relation between the existence of solutions to a competitive equilibrium and the problems of normative or welfare economics.
A speculator is a man who observes the future, and acts before it occurs.
教育并不像在花园里播种一样在我们身上种植能力;它只是引导它们走向应该走的方向。
"The dead are invisible, they are not absent."
最好的表演来自内心,而不仅仅是声音。