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。
The oil and gas in this region are under more than a mile of water and a thick layer of salt.
这个海域的油气埋藏在一英里多的水面下，还要打穿厚厚的盐层。
Subdivision of layer series of development was carried out in major blocks with thick oil layers.
为提高开发效果，对油层厚度大、具备细分层系的主力区块，进行细分开发层系调整。
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