1·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》
2·Earth's continental crust has changed significantly in composition overtime.
随着时间的推移，地球大陆地壳的组成发生了巨大的变化。
3·Under the atmosphere, scientists think there is a very thin crust of carbon and oxygen.
科学家们认为在大气层下存在着一层由碳和氧组成的稀薄地壳。
4·Much more than the crust, the mantle contains information about a planet's or moon's total composition.
地幔包含的远远不仅是地壳，还有关于行星或卫星的总体构成的信息。
5·In this case, we especially want to know if any of the mantle, the layer beneath the crust, was exposed by the impact.
这种情况下，我们特别想知道存在于地壳下层的地幔，是否会因为撞击而暴露出来。
1·It is a bitter crust, alas!
这是个苦涩的外壳，唉！
2·The exhausted man and the trustful guy thrust a knife into the rusty crust.
精疲力竭的男子和深信不疑的家伙将一把刀子刺向生锈的外壳。
3·He could sense the right place to hit so that the rock crust would cleave and reveal the coal, in the same way that a sculptor can sense exactly where to hammer a chisel into a stone.
他可以感觉到正确的敲击位置，这样岩石的外壳就会裂开显出煤矿，正如雕塑家可以精确知道在石头的什么位置而用凿子敲击一样。
4·And below the crust in these volcanic parts micro-organisms have been discovered that may offer clues to the origins of life.
在火山的外壳下面发现有微生物，它们可能为生命起源研究提供一些线索。
5·One leading idea is that gravitational tidal forces reshaped the moon's crust and made it lopsided. But the new theory builds on the "giant impact" model that explains the moon's creation.
一种主流看法认为是重力潮汐作用改变了月球的外壳，并使其向一侧倾斜，但该新理论是以解释月球成因的“大碰撞”模型为基础的。