The most ancient parts of the continental crust are 4000 million years old.

该大陆地壳最古老的那些部分有40亿年了。

《柯林斯英汉双解大词典》

Earth's crust contains very little of this element, but most asteroids contain a lot more.

地壳中含有的这种元素很少，但大多数小行星上的要多得多。

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Geologists have found that the crust is about 4 to 10 miles thick under most of the oceans.

地质学家发现在绝大部分的海洋下面地壳厚度都是大约在4 - 10英里之间。

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Between 50 and 80 people reportedly died, but the poorest and most foolhardy locals ran barefoot over the burning lava crust towards the fire, desperate to salvage something useful or saleable.

ECONOMIST: Eruption in Congo: Congo's angry mountain | The