When public speaking， pause frequently. Pause before you say something in a new way， pause after you have said something you believe is important， and pause as a relief to let listeners absorb details.

学习的最好方法就是教。

The last temptation is the greatest treason: to do the right deed for the wrong reason.

语出西汉·桓宽《盐铁论·疾贪》。表：古代测量日影以计时的标杆。要想让影子正，就要先将标杆树直；要想让下面的人清廉，就要先自己做到清廉。说明上位是下位的表率。

在量子力学中，测量的行为可以改变被测量系统的状态。