The paintings were concealed beneath a thick layer of plaster.

那些画被隐藏在厚厚的灰泥层下面。

《牛津词典》

Beneath the soil lies a layer of bedrock.

土壤下面有一层基岩。

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Leatherbacks do not have blubber, but they do have a reptilian equivalent: thick, oil-saturated skin, with a layer of fibrous, fatty tissue just beneath it.

棱皮龟没有鲸脂，但它们有和爬行类动物相似的结构：厚且含油的皮肤，下面有一层纤维，再下面是脂肪组织。

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Chevron determined the best place would be the Dupuy Formation, a geologic layer a mile beneath Barrow that contains a saline aquifer.

FORBES: Magazine Article

And echoing through the ancient temple is the sound of a river flowing even beneath this layer, running through a Republic-era drain.

BBC: Going underground at the Colosseum

It appears the major sticking point concerns the depth of the memory layer on which data is written: HD-DVD favors a data layer 0.6mm beneath the surface of the disk, the same depth as on the current generation of DVDs.

ENGADGET: DVD format war: Matsushita says Toshiba needs to give up