Helium is the lightest rare gas.

氦是最轻的稀有气体。

The last column are rare gas, stable chemical properties.

最后一列上都是稀有气体，化学性质稳定。

Neon, a rare gas in the air, takes only fractional percentage point of the volume.

氖是空气中的稀有气体，只占空气体积的千分之几。

Since the middle of last century, physicists have all along conducted studies on the rare gas crystals.

从上世纪中叶以来，物理学家对稀有气体晶体进行了大量研究。

Their results show that interatomic repulsive of the rare gas can be expressed by the overlap integrals.

计算结果表明该重叠积分可以用来表示稀有气体原子间的排斥势。