单词：iron mineral
iron mineral的用法和样例：
例句
- Many iron minerals are only slightly magnetic.不少铁矿物只有微弱的磁性。
- Pyrrhotite is the most common and abundant iron sulphide mineral in mine wastes worldwide.磁黄铁矿是矿山尾矿堆中最为常见且分布很广的一种硫化铁矿物。
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