We think meteors that crashed into the moon or tails of passing comets may have introduced water molecules.

我们认为，撞击月球的流星或经过的彗星尾巴可能会留下一些水分子。

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Instead of making a clean break, water evaporating from treetops tugs on the remaining water molecules, with that tug extending from molecule to molecule all the way down to the roots.

从树梢蒸发的水并没有彻底地分解，而是拉住了剩下的水分子，这种拉拽作用从一个分子延伸到另一个分子，一直拉到根部。

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Thus our bodies continuously exchange old substance for new, just like a spring which more or less maintains its form and movement, but in which the water molecules are always different.

因此，我们的身体不断地把旧物质替换成新的，就像一个喷泉，或多或少地保持着它的形式和运动，但其中的水分子总是不同的。

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In September, NASA scientists had announced the discovery of water molecules mainly in the moon's extreme northern and southern areas.

VOA: special.2009.12.30

Many kinds of molecules make up your coffee There are the water molecules, the flavor molecules the milk proteins, etcetera.

许多不同种类的分子构成了你的咖啡,有水分子，气味分子，牛奶蛋白等等。

麻省理工公开课 - 热力学与动力学课程节选

If I get you down to a cluster of about 30 water molecules, the boiling point is a function of the size of the water droplet.

如果对于一个由30个水分子,组成的簇，沸点是,水珠尺寸的函数。

麻省理工公开课 - 固态化学导论课程节选

The excited water molecules dissipate their energy by bashing against the enamel and bone.

FORBES: A Painless Root Canal?

Using computer simulations, David Clary of University College, London, has examined how water molecules bond together.

ECONOMIST: Molecular bonding

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

FORBES: Magazine Article