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。
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.
他得学着面对自己的恐惧，他不可能永远都是三岁，更何况凛冬将至。
The quality of an organization's learning determines the quality of its improvement.
我只是想成为最好的自己。