可持续性不是一种选择；而是我们对地球和未来奶农的义务。

问余此世欲何为，度日安宁呱噪微。

灵魂不灭。

To be happy is to be able to become aware of oneself without fright.

In the world of mathematics, every question leads to another, creating an endless web of knowledge that connects all areas of science.

The general will is always right， but the judgment which guides it is not always enlightened.