The streets of Paris have a memory of their own.

Sustainability isn't just a buzzword; it's our responsibility to future generations.

图画书就像一个小剧场。

The Langlands program is a vision of how mathematics could be unified in a single framework.

我不是完美主义者，但我喜欢把事情做好。

宇宙是对称群表示的巨大直积。