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

编程的艺术是组织复杂性的艺术，是掌握多样性并尽可能有效地避免其混乱的艺术。

书籍是连接我们与未来的桥梁。

品质是企业的生命线，没有品质就没有市场。《品质决定未来》

I try to make movies that are like little worlds that you can step into.