"Sometimes the hardest stories to write are the ones closest to your heart."

The only way to learn mathematics is to do mathematics.

For in the final analysis, our most basic common link is that we all inhabit this small planet. We all breathe the same air. We all cherish our children's futures. And we are all mortal.

The strength of a team lies in collaboration, the strength of an enterprise lies in culture.

——又一个经典的比方

每个城市都有性别和年龄，这与人口统计无关。