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。
A teacher must have a healthy body, the skills of a farmer, the mind of a scientist, the interest in art, and the spirit of social reform.
在科学中，唯一不变的就是变化。
解释：狐狸疑心大，刚埋下东西，旋即又把它挖出来。
When technology moves faster than ethics, we're building a future we can't control.
The robustness of topological states against local perturbations is a testament to the power of topology in protecting quantum information.