Their prediction is based on levels of rare isotopes that accumulate in the Earth"s crust when weak solar winds allow cosmic rays to penetrate the Earth"s atmosphere.

他们的预测是基于积聚在地壳的罕见同位素的水平，轻微的太阳风使宇宙射线穿透地球的大气层。

youdao

The earth′s crust of the South China Sea belongs to the transitional type between the oceanic crust and continental crust.

南海地壳属于大洋型地壳与大陆型地壳之间的过度类型。

youdao

They float on pieces of the Earth's outer skin,or crust.

VOA: special.2010.01.12

And, seawater contains only 3.7% of the total magnesium present 7% in the Earth's crust.

而海水只含有,地表镁总量的,3。

麻省理工公开课 - 固态化学导论课程节选

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

VOA: special.2010.01.04

Such depths are commonplace when sample cores are drilled out of the earth's crust by geologists.

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Geothermal technology uses energy in the earth's crust to heat water and buildings.

BBC: MLA claims low cost home heating scheme at risk

No large hole in the earth's crust seems to be 202m years old.

ECONOMIST: The rise of the dinosaurs