教师的人格是教育的基石。
The personality of the teacher is the cornerstone of education.
Your so-called boss may own the clock that taunts you from the wall, but, my friends, the hour is yours.
A mathematician's work is never done; there are always more problems to solve.
人生起落无常，低谷时别放弃。
市场是集体思维的镜子。