We don't own the land, we borrow it from our children.

弦理论的景观是广阔而复杂的，可能有10^500个不同的可能宇宙。

The most incomprehensible thing about the world is that it is at all comprehensible.

The value of freedom is truly understood only when lost.

教育体系是以感官基础,以思考为过程,以自由为目的。