In the field of new energy, we must not only produce good products but also build a good ecosystem.

【解释】脑力劳动者统治人，体力劳动者被人统治；被统治者养活别人，统治者靠别人养活，这是通行天下的原则。

I know that I am intelligent，because I know that I know nothing.

文学是可见世界与不可见世界之间的桥梁。