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.
I am not a fast thinker at all. I have to spend a lot of time before I can understand something.
To love to read is to exchange hours of ennui for hours of delight.
煤炭开采的创新不仅仅是技术问题，更是思维方式的转变。
建筑是关于创造人与自然之间的对话。
I don't let anyone define me.