名词
中文翻译：Unknown
同义词：
['calcareous', 'calcified', 'limestone例句：1. The ancient city is buried under layers of white tephroite.（这个古城被厚厚的白垩土所覆盖。）']
例句：
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1. The ancient city is buried under layers of white tephroite.
这个古城被厚厚的白垩土所覆盖。
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2.The tephroite formations are a wonder of nature.
这些白垩土层是大自然的奇迹。
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3. The tephroite was used as building material for the ancient civilization.
白垩土被用作古代文明的建筑材料。