永远不要停止学习,一旦停止,你就会开始落后。
Perhaps as important is the relation between the existence of solutions to a competitive equilibrium and the problems of normative or welfare economics.
The true discovery of America is before us. The true fulfillment of our spirit, of our people, of our mighty and immortal land, is yet to come.
After climbing a great hill, one only finds that there are many more hills to climb.