可持续采矿不再是可选项 - 这是我们对后代的责任。

The right of nature... is the liberty each man hath, to use his own power, as he will himself, for the preservation of his own nature; that is to say, of his own life.

一切都在流动，一切都在变化，没有永恒不变的东西。

制造链式反应机器的基本点当然是确保每次裂变产生一定数量的中子，其中一些中子再次有效地产生裂变。