名词
中文翻译：砂岩
同义词：
['limestone', 'sandstone']
例句：
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1.The beach is covered in smooth, sandy limestone.
海滩上覆盖着光滑的砂岩。
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2. Sandstone formations are common in the desert regions of the world.
世界上的沙漠地区常见有砂岩形成。
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3.The geologists used the sandy limestone to study the ancient riverbed.
地质学家利用砂岩研究古代河流床。