Plate movements are the surface expressions of motions in the mantle—the thick shell of rock that lies between Earth's crust and its metallic core.

板块运动是地幔运动的表面现象。地幔是位于地壳和金属内核之间的一层厚厚的岩石壳。

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They also looked at pictures of a leaf, shell, or rock.

他们也观看树叶，贝壳或石头的图片。

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Larger ones, such as BP, Chevron and Shell, are setting up their own digital-rock-physics laboratories.

而大型石油公司—如BP、雪佛龙和壳牌正在创建自己的数字岩石物理实验室。

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On federal lands, Shell has been researching methods to cook oil out of the shale (basically oil-soaked rock) without mining it or polluting groundwater.

FORBES: OutFront