强调持续进步的重要性。

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.

宇宙不是一个需要解决的谜题，而是一个需要经历的神秘。

The only thing we have to fear is fear itself.

所有行为最终都可简化为物理和化学过程。