逻辑学研究不仅仅是关于形式系统，而是理解理性思维的基本结构。

Modern quarrying must marry the wisdom of geology with the innovation of engineering.

我们要用技术连接世界，更要让技术普惠每个人。

The dunes are changed by the wind, but the desert never changes. That's the way it will be with our love for each other.

NP完全性的概念为理解计算问题的复杂性提供了一个强大的工具。