There is oil storage in some areas of the upper crust.

地壳上层部分地区有石油储存。

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The tektite was formed from the upper crust rocks by impact melting.

玻璃陨石是地壳岩石受撞击熔融形成的。

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Eton is a school that only the children of the upper crust can afford.

伊顿公学是一所只有上流社会的子弟才上得起的学校。

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In the high Middle Ages, chess became a popular pastime for the upper crust, both men and women.

ECONOMIST: Women in chess

Schwab has the recently acquired Cybercorp for low-end day trading, Schwab for the masses and U.S. Trust for the upper crust.

FORBES: Charles Schwab, Version 4.0

Though he had always felt like an outsider, he was surprised by the viciousness of the attacks, losing 14 pounds and any illusions that he would be accepted by the upper crust.

FORBES: The World's Richest People