理论必须是美丽的。

Each generation takes the earth as trustees.

一部小说永远不会完成；它只是被遗弃。

混凝土是我们时代的大理石，一种民主的材料。

我不是说唱歌手，我是流行巨星。

Energy security is a crucial part of national strategic security, and we must firmly keep it in our own hands.