Data from a later mission indicates significant concentrations of hydrogen and by inference water less than a meter underground at both poles.

从后来的任务中得到的数据显示，在两极地下不到一米的地方有浓度相当高的氢，由此推断是水。

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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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Also, data from a later mission indicates significant concentrations of hydrogen and by inference water less than a meter underground at both poles.

同样，最近的一项月球探测任务数据显示，那里氢气高度密集，据推测，两级的水就在地下不到一米处。

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The nebulous field of nanotechnology, freighted with as much hype as legitimate promise, boils down to the process of manipulating matter on a molecular scale (a nanometer is one-billionth of a meter, about the width of ten hydrogen atoms).

FORBES: The Science of Small

The nebulous field of nanotechnology, freighted with as much hype as legitimate promise, boils down to the process of manipulating matter on a molecular scale (a nanometer is one billionth of a meter, about ten times the width of a hydrogen atom).

FORBES: The science of small