What the researchers found deep in the lunar interior: a solid iron ball 300 miles across, wrapped in molten iron another 56 miles thick, topped with a 93-mile layer of partially molten material.

研究人员发现在月球内部深处：有一个跨度约为300英里的固体铁球，包裹在另外56英里厚的铁水里，顶上部分地还有93英里层的熔融材料。

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Bar material for the stone on a layer of copper, that is functional, and the interpretation of a sense of thick and classic.

吧台的材料为石材上铺上一层铜板，即具有功能性，又演绎出具有厚重感和高级感。

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It's an arduous, time-consuming process, using atomic layer deposition to spray material that's an atom thick, on a microscopic surface.

使用原子层沉积物在一个微小的表面对只有一个原子这么厚的材料进行喷涂，可是一个费力、耗时的过程。

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But further measurements using a laser and looking for reflections showed that much of the ice is covered with a layer of dark material tens of centimetres thick.

BBC: Mercury's water ice at north pole finally proven

The most promising sail material has a carbon-fibre backing coated with a thin layer (just a few tens of atoms thick) of aluminium.

ECONOMIST: Rockets are not the only way to travel through outer space