helium gas

基本解释

Helium gas was the thermometric fluid.
氦和氩都是单原子气体。
Even if they are hit, though, they do not explode because the helium gas that keeps them airborne is not flammable.
即使它们被击中，也不会爆炸，因为使它们升空的氦气使它们在不可燃。
The helium gas turbine methodologies adopted by them are mainly based on the developed heavy duty industrial and aviation gas turbine technology.
他们所使用的氦气透平技术主要基于现在的重工业燃气透平技术和航空发动机技术。

I would say with the aid of an energy level diagram explain the fact that helium is found as atomic gas and not molecular. How about this one?
我要说的是，在能级图的帮助下,可以解释氦气是单原子气体,而不是分子气体这一事实,那么这个呢？
麻省理工公开课 - 固态化学导论课程节选

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