竞争均衡解决方案的存在与规范经济学或福利经济学之间的关系也许同样重要。
Perhaps as important is the relation between the existence of solutions to a competitive equilibrium and the problems of normative or welfare economics.
Peace is not the absence of war， but a virtue based on strength of character.
意识像河流一样流动，总是朝着有目的的方向前进。
人生苦短，不能不冒险。
艺术不是奢侈品，而是必需品。