名词
中文翻译：石灰石
同义词：
['limestone', 'lime rock例句：1. The limestone cliffs are a popular destination for tourists.（石灰石悬崖是游客的热门目的地。）']
例句：
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1. The limestone cliffs are a popular destination for tourists.
石灰石悬崖是游客的热门目的地。
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2.The limestone formation is believed to have been formed over millions of years.
石灰石形成被认为是数百万年形成的。
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3. The limestone was used as building material in ancient times.
古代使用石灰石作为建筑材料。