读书人应当以天下大事为自己的责任，不能仅仅做一个只会钻研书本的学者。
As a clean energy source, natural gas will play a significant role in China's energy structure adjustment.
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.
The bigger the company, the smaller we should think.