名词
中文翻译：Unknown
同义词：
['calcium carbonate', 'limestone', 'calcite']
例句：
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1. The chemical industry uses calcium carbonate to produce fertilizers and plastics.
化学工业使用碳酸钙生产肥料和塑料。
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2. The limestone is used in building materials and as a natural cement.
石灰石用于建筑材料和天然水泥。
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3. The calcite crystals are found in the ocean floor and can be mined for their value.
方解石晶体存在于海底，可以开采以获取其价值。