自由是在法律允许范围内做任何事的权利。
Nothing is lost, nothing is created, everything is transformed.
 真相往往难以表述,有时需要虚构来使其看似可信。
I'm not a master, I'm a slave.
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.