In international trade, a country should specialize in the production of goods for which it has a comparative advantage, and trade with other nations to maximize overall economic welfare.

生活就是关于成长和改变。当你停止成长，你就停止了生活。

The way in which men produce their means of subsistence depends first of all on the nature of the actual means they find in existence and have to reproduce.

过去是一个跟随我们的影子，但选择让它定义我们还是走向光明，是我们的选择。