Significant deviations have occurred between our hydrogen value and the market value when the hydrogen demand is very brisk and price is rising at the petrochemical market.

在石化市场需求旺盛，价格上涨之时，我们的氢气价值和市场价值发生了很大的偏离。

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The value of the critical density is very small: it corresponds to roughly 6 hydrogen atoms per cubic meter, an astonishingly good vacuum by terrestrial standards!

临界密度的值非常小：它相当于每立方米约6个氢原子，从地球上的标准来看这简直是真空！

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Hydrogen can replace acetylene, gas, liquefied petroleum gases such as carbon, with high calorific value, flame concentration, zero pollution, high efficiency, energy saving and easy.

氢气可以取代乙炔、煤气、液化气等含碳气体，具有热值高、火焰集中、零污染，生产效率高，节能方便等优点。

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It is the value of the radius of the ground state electron orbit in atomic hydrogen.

它就代表氢原子基态电子,的轨道半径。

麻省理工公开课 - 固态化学导论课程节选

And then this second term, if we go to the Periodic Table, 2 we will find that the value here for hydrogen is 2.2 98 and the value for fluorine is 3.98.

再算上第二个条件，翻看元素周期表，我们查处H，F电负性分别为2,2。2，3。

麻省理工公开课 - 固态化学导论课程节选

And I want to really highlight here we're talking about for a hydrogen atom orbitals - with the same n value have the same energy.

我想强调的是,我们所说的,都是对单个的氢原子,和言的,对于同样的n值能量相同。

麻省理工公开课 - 化学原理课程节选