名词
中文翻译：铁石
同义词：
['ironstone', 'ferriferous stone']
例句：
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1.The ironstone is a valuable mineral that can be used for construction.
铁石是一种有价值的矿物，可用于建筑。
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2. The ironstone was mined from the mountain and used to make tools.
铁石从山上开采出来用于制作工具。
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3. The ironstone has been found in many places around the world, including China.
铁石在世界许多地方都有发现，包括中国。