法律体系是根据其自身的有效性标准而有效的规则体系。
A legal system is a system of rules which are valid according to the system's own criteria of validity.
定义就是限制。
信息悖论挑战了我们对宇宙的理解,推动我们重新思考物理学的基础。
Business is like war—you need a strategy, but you also need to adapt when things go wrong.