To solve complex problems, we must first understand the systems that create them.

Collaboration across industries and governments is essential to tackle the global challenge of climate change.

The concept of polynomial-time reduction is central to understanding the structure of NP-complete problems.

教育是对人力资本的投资，会以更高生产率的形式获得回报。

过去是一个陌生的国度；他们在那里做事的方式不同。