教师必须具有健康的体魄，农人的身手，科学的头脑，艺术的兴味，改革社会的精神。

"Success is a lousy teacher. It seduces smart people into thinking they can't lose."

描写战争就是描写随之而来的沉默。

Coal isn't the problem - how we use it is. The solution lies in cleaner technologies and better utilization.

质量不是成本；它是一种投资。