A molecule of water consists of two atoms of hydrogen and one atom of oxygen.

水分子由两个氢原子和一个氧原子构成。

《牛津词典》

Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water.

两个氢原子和一个氧原子结合组成一个水分子。

《牛津词典》

At some point, you will cut the magnet so small that you will have cut down to the size of a single atom.

从某个方面看，你会把磁体切到如此之小，小到只有一个单原子那么大。

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The researchers found the presence of carbon thirteen, a version of the carbon atom that is usually found in space.

VOA: special.2009.09.30

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。

麻省理工公开课 - 固态化学导论课程节选

Sometimes we have a very electronegative atom that's going to take more of its equal share of electron density.

有时候我们会有一个电负性很高的原子,它将会获取更多的共用电子密度。

麻省理工公开课 - 化学原理课程节选

The idea was to get one of each type of atom to stick together to become a single atom of element 118.

ECONOMIST: Nuclear physics

Physicists at the University of New South Wales have created a transistor composed of a single atom, which is an amazing feat of nanoengineering, and could provide a better foundation for scalable quantum computing.

FORBES: Scientists Create A One-Atom Transistor

How did two atoms of hydrogen wind up welded to a single atom of oxygen?

FORBES: The Story Of Eau