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.
翻译：所以不完全了解用兵的危害，就不能完全了解用兵的好处。
【释义】处于安乐之境要想到危险，想到了就有准备，有准备就能避免祸患。
如果你能梦想它，你就能实现它。
I believe that science has great potential to improve human life.
Investors should avoid trying to predict the market; it's a fool's errand.
