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.

会有障碍。会有怀疑者。会有错误。但只要努力，就没有限制。

The most beautiful thing in mathematics is the simplicity of the ideas behind the complexity.

你不是在建立企业，你是在培养人，然后由人来建立企业。

【讲解】：发奋时候竟忘记吃饭，快乐时候就忘记了忧愁，把自己就要老了这件事也不放在心上，如此罢了。”