中国的崛起和俄罗斯的复兴挑战了自由民主是唯一可行的政府形式的观念。
A program that has not been tested does not work.
技术突破需要长期投入和耐心,不能急功近利。
Mathematics is a way of thinking, not just a collection of facts.
Sustainability isn't a buzzword; it's the foundation of modern resource extraction.