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.
Innovation in fishing technology must go hand in hand with conservation efforts. They are not opposing forces, but complementary ones.
我不知道没有音乐我会做什么。
"Words are, of course, the most powerful drug used by mankind."
反馈是鲁棒控制系统的关键。