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Hydrogen gas it's in its most stable state, right at room temperature and pressure.
和常压下氢气是氢元素，最稳定的状态，这个小“0“
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Now in this particular reaction, I've got hydrogen gas, iron solid. Those already are elements in their most stable forms at room temperature and pressure.
特定的反应中，我有氢气,固态铁，这些都已经是,处于室温和常压下,最稳定的元素单质。
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There are all kinds of different ways of bombarding, in this case, hydrogen gas.
有各种各样不同的方法进行轰炸，在这种情况下，我们用氢气。
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You take your room temperature liquid helium and you cool it with liquid nitrogen to 77 degrees Kelvin, the new, you're not quite there yet 77k unfortunately right? Then you take hydrogen you cool it would liquid nitrogen to 77, then you can use your hydrogen gas.
首先要有常温的氦气,拿液氮把它冷却到77k，那个新来的7,你不坐在那儿，对吧？,然后用液氮把氢气降温到,然后就可以使用这个氢气了，想要用氢气来做焦耳-汤姆孙实验。
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This is for atomic hydrogen gas.
但这只是针对气态氢原子的情况。
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I'm going to write it like this three moles of hydrogen which is a gas one bar 100 degrees Celsius.
我会写成这样：,三摩尔氢分子，气体,1巴，100摄氏度。
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Let's look at the energetics of one of those electrons crashing into a hydrogen atom inside the gas tube.
我们一起来考察一下,其中的一个电子的能量,在阴极射线管中,撞击到氢原子上。
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He had a tube with electrodes potted in it filled with atomic hydrogen. And by applying a voltage, he was able to get the gas to glow.
那是个装满了氢原子并含有电极的管子,通过增加一个电压，他让气体燃烧起来了。
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This is the diagram taken right from your text, there are the two electrodes coming in and this is atomic hydrogen in the gas tube.
这是从教科书上复制下来的图表，这里有两个电极进来,这是气体管中的氢原子。
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Let's just take hydrogen and nitrogen in the gas phase and form ammonia.
我们利用氢气和氮气,合成氨。
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Because only atomic hydrogen has that set of lines which means I could then take the spectra of gas phase species and use that information to identify.
我在这抬头看看然后离开，那就是氢原子,那就意味着,我可以测定,气相种类的光谱并且运用那个信息来鉴定。
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