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.
"To live is to choose, but to choose well, you must know who you are and what you stand for."
Certification is the grammar of responsible forestry.
Music is the only thing that makes sense to me.