名词
中文翻译：铁石
同义词：
['ironstone', 'ferrosilicate']
例句：
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1.This ironstone has been used for centuries as a building material.
这种铁石被用作建筑材料使用了好几个世纪。
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2. The ironstone mine is located in the heart of the mountain range.
这个铁矿位于山脉的中心地带。
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3. The ironstone was mined and quarried by ancient civilizations.
古代文明开采并开采了这种铁矿石。