Stairs lighting, for example, does not only lighten the atmosphere, but also highlights a transformation of a floor layer, from pleating floor to an outdoor bar.

楼梯照明，例如，不仅减轻大气，而且还凸显了一个一层楼的转变，从打褶发言户外酒吧。

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The forest floor is the lowest layer full of animal life and receives the least amount of light.

地面层是最底层，那里满是动物，接收到的光线最少。

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Sediment cores are essentially a record of sediments that settled at the sea floor, layer by layer, and they record the conditions of the ocean system during the time they settled.

沉积物岩心主要记录的是沉淀在海底沉积物，一层又一层，记录它们沉淀时的海洋系统状况。

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So did a thick, solid layer of sheep dung covering the floor.

VOA: special.2010.08.03

Methane is the principal component of natural gas, and massive amounts of it are trapped in reservoirs beneath the sea floor and under a layer of the ice-like substance.

FORBES

The archaeologists put the shoe's remarkable preservation down to the stable, cool and dry conditions in the cave and the fact that the floor of the cave was covered by a thick layer of sheep dung.

BBC: 'Oldest leather shoe' discovered

The final layer is often panels of loose-weave or sheer fabric hanging in soft drapes to the floor.

WSJ: Sheer Curtains, Solar Shades Are Popular Window Treatments