In the early years of the 1850s, Armstrong, still at uppsala university in Sweden, conducted an experiment with hydrogen atoms.

在19世纪50年代的头几年，阿姆斯特朗，那时还在瑞典的乌普萨拉大学里，做了一个有关氢原子的实验。

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There are just two hydrogen atoms per cubic centimeter on average in space, which poses no threat to spaceships traveling at low speeds.

太空中平均每立方厘米只有两个氢原子，这对低速飞行的宇宙飞船不构成威胁。

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Well, we've got to hydrogen atoms here.

现在我们这有一个氢原子。

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Water is made of one oxygen atom and two hydrogen atoms.

VOA: special.2009.09.30

He has two electrons here with the same set of quantum numbers. B but these are two separate hydrogen atoms.

因为我写了两个量子数,一样的电子,但这是在两个不同原子中啊。

麻省理工公开课 - 固态化学导论课程节选

Then we'll move on to talking about the binding energies, and we'll specifically talk about how that differs from the binding energies we saw of hydrogen atoms.

然后我们将会讨论结合能,而且我们将特别地讨论，那个如何与氢原子,的结合能不同,我们讨论氢原子特别深入。

麻省理工公开课 - 化学原理课程节选

The Apollo space program relied on hydrogen fuel cells, which work by stripping electrons from hydrogen atoms.

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The water molecules' two hydrogen atoms, which are split from oxygen by electrolysis, go in different directions.

FORBES: Magazine Article

One hydrogen atom pairs with other free hydrogen atoms to create hydrogen gas, which is also captured and sold.

FORBES: Magazine Article