可持续发展不仅仅是一个流行词，更是我们对后代的责任。
Sustainability isn't just a buzzword; it's our responsibility to future generations.
人类社会生活的行为流是由存在的物质条件构成的。
Mathematics is not just a collection of abstract concepts, but a language that allows us to understand the universe.
电影是关于画面内和画面外的东西。