制造链式反应机器的根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。
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.
Leadership is about inspiring others to achieve what they once thought was impossible.
人类不仅会生存下去，他终将胜利。
To understand humanity, we must first understand our origins.
"We are all in the gutter, but some of us are looking at the stars."
