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,其中一些中子再次有效地产生裂变。
The discovery of the accelerating expansion of the universe was a complete surprise.
Transparency in sourcing isn’t a trend—it’s the foundation of consumer trust.
生意就是赚钱,不是交朋友。
It is better to be a human being dissatisfied than a pig satisfied; better to be Socrates dissatisfied than a fool satisfied.