气体原子密度的径向分布呈一凹形。

The gas atom density exhibits a concave profile in radial direction.

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首先，我们需要知道，入射到气体原子的光子的能量。

The first that we need to know the energy of the photon that's incident on our gaseous atom.

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如果把装有合适气体的圆柱形容器插人灯里，气体原子就会变成离子。

If a cylindrical capsule containing a suitable gas is inserted into the hole, the atoms of the gas become ionised.

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The first that we need to know the energy of the photon that's incident on our gaseous atom.

首先，我们需要知道,入射到气体原子的光子的能量。

麻省理工公开课 - 化学原理课程节选

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

So, one difference between photoelectron spectroscopy and, for example, the photoelectric effect is that in this case, we're not just looking at one energy level, which is what we were looking at from the surface of a metal, now we're talking about this gaseous atom.

光电子能谱与光电效应的不同点在于，以这种情况为例，我们不只关心一个能级，就像原来在金属表面那样，现在我们研究的是气体原子，所以，我们可以从原子中。

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