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，其中一些中子将再次产生裂变。
我们必须筑起勇气的堤坝，挡住恐惧的洪流。
林业的短期收益往往会导致地球的长期损失。
The first man who， having enclosed a piece of ground， bethought himself of saying 'This is mine，' and found people simple enough to believe him， was the real founder of civil society.
The world is a place of chaos and confusion, and the only way to make sense of it is to find your own path through it.