拓扑学是对图形在任何变形下保持不变的性质的研究。

What matters in life is not what happens to you but what you remember and how you remember it.

The companies that will thrive in the future are those that serve society.

Writing is a way of breathing.

生活就是一种艺术，而我们每个人都是自己生命的艺术家。