国家本质上是侵略性和扩张主义的，因为它们存在于一个无政府状态的国际体系中，没有更高的权威来约束它们。

The stock market is a no-called-strike game. You don't have to swing at everything—you can wait for your pitch.

Regulatory pressure is accelerating innovation faster than market forces alone could achieve.

The piano is my therapy.

概率是基于部分知识的预期。