名词
中文翻译：地壳
同义词：
['stratum', 'crust', 'igneous rock', 'sedimentary rock']
例句：
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1.The geologist is studying the layers of the earth's crust to understand its history.
地质学家正在研究地球的地壳层次以了解其历史。
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2.The ancient civilization was buried under layers of sedimentary rock.
古代文明被沉积岩层所埋藏。
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3. The scientists are analyzing the isotopic composition of the rocks in different layers of theearth's crust.
科学家们正在分析地球地壳不同层次岩石的同位素组成。