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。
地球形状的问题本质上是势理论中的一个问题。
I think the key to a good performance is to be able to listen and react truthfully.
I don't let setbacks stop me. They make me stronger.