全球化并不是普遍现象，而是西方文明的产物。

Sustainability isn't an option; it's a necessity for the future of our industry.

"A book is a fragile creature, it suffers the wear of time, it fears rodents, the elements and clumsy hands. So the librarian protects the books not only against mankind but also against nature and devotes his life to this war with the forces of oblivion."

人们有时为了得到自己想要的东西，会变得残酷。

《在广州石围塘检阅滇均的演说》（1924年4月4日）

数学中最重要的是提出正确的问题。