每一个挑战都是学习和成长的机会。

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.

媒介不仅传递信息，它定义了我们理解世界的方式。

Happiness comes from between. It is not something that you can find, acquire, or achieve directly. You have to get the conditions right and then wait.

成长是痛苦的，但也是必要的。