True sustainability means leaving the land better than we found it for future generations.

当人民被迫服从而服从时，他们做的对。但是，一旦人民可以打破自己身上的桎梏而打破它时，他们就做的更对。

文学是人类灵魂的镜子，在其中我们都能看到自己的反映。

The fundamental point in fabricating a chain reacting machine is of course to see to it that each fission produces a certain number of neutrons and some of these neutrons will again produce fission.