Natural asphalt storage in underground, some forming seam or piled up in the earth's crust surface.

天然沥青储藏在地下，有的形成矿层或在地壳表面堆积。

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Remote sensing image is the image model of the crust surface, as well as an ideal prototype to establish a geological genetic model.

遥感图像是地壳表层的图像模型，是建立地质成因模型的理想原型。

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As the water evaporates, a crust of salt is left on the surface of the soil.

水蒸发后，土壤表面留下一层盐。

《柯林斯英汉双解大词典》

Then,seventy-million years ago, the Earth's surface, or crust,pushed upward.

VOA: special.2010.01.04

As it hobbled along, it broke through the crust of the surface and got stuck in an area called Troy.

CNN: What we've done on Mars, and what's next

In the months ahead, scientists expect to probe beneath the planet's surface crust for evidence of chemistry favorable to microbial life, using the robot rover's unique high-speed drill.

WSJ: NASA's Curiosity Rover Lands on Mars

The magma bubbles up through the crust, ultimately bursting to the surface and forming volcanic eruptions.

FORBES: 2011 Forecast: World Outperforms U.S., Europe Scuttles