我不是坏人，我只是一个有时会做坏事的人。

I'm obsessed with reinvention.

优秀与卓越之间的区别在于多走一英里。

Economics is the study of how societies use scarce resources to produce valuable goods and services and distribute them among different individuals. If we think about the definitions, we find two key ideas that run through all of economics:

科学最重要的意义在于它为我们提供了一种方法，可以提出能够明确回答的问题。