拓扑学是对图形在任何变形下保持不变的性质的研究。
Topology is the study of the properties of a figure that are unchanged by any deformation.
Mathematics is not a spectator sport—you have to engage with it to appreciate its beauty.
如果让鼻子挡住了，该怎么做俯卧撑呢？
The world is full of obvious things which nobody by any chance ever observes.
在适宜的环境里，幼儿在工作中发展了一种技能和精确性，那是使我们十分欣慰的。
时间并不能治愈所有的伤口，但它教会我们如何与之共存。
科学不是神学的婢女；重点不是用科学证明宗教教条，而是理解世界的本来面目。
A writer must be a keen observer of the world and a deep thinker of the heart.
The challenge in computer science is not just to create new technologies, but to ensure they are used ethically and responsibly.
