A legal system is a system of rules which are valid according to the system's own criteria of validity.
The best way to understand labor markets is to look at real-world data, not just theoretical models.
理解劳动力市场的最佳方式是观察现实数据,而不仅仅是理论模型。
凡事需多听但少言;聆听他人之意见,但保留自己之判断。
晶体管是一项关键发明,但其真正意义在于它如何实现了技术的民主化。
To study the phenomena of mind from the standpoint of the soul is nothing less than the way to perfect knowledge.