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。
Overall, the crust of studied area is thick in north and thin in south.
总体看研究区的地壳厚度是南浅北深。
It is very dangerous to walk on the thin crust of ice.
〔在这样一层薄冰上行走是很危险的。
It is very dangerous to walk on the thin crust of ice.
〔在这样一层薄冰上行走是很危险的。
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