名词
中文翻译：白垩石
同义词：
['limestone', 'chalk', 'lime']
例句：
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1.The ancient city of Pompeii is located on the coast of Italy and is famous for its beautiful white limestone buildings.
庞贝古城位于意大利海岸，以其美丽的白色石灰岩建筑而闻名。
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2.The geologist used a microscope to study the crystal structure of the limestone.
地质学家使用显微镜研究石灰岩的晶体结构。
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3.The limestone formations are formed over millions of years by the slow accumulation of sediment.
石灰岩层是在数百万年的时间里，缓慢地沉积物积累形成的。