"We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm."

Economic development requires a stable legal environment.

"Every ending is just a new beginning in disguise."

理解学习问题的计算复杂性对于开发高效算法至关重要。

Technology should serve ecology, not the other way around.

The most important thing in science is not so much to obtain new facts as to discover new ways of thinking about them.