coarse ore

例句：

1. 1. The mine produces a variety of minerals, including coarse ore.
   这个矿场生产各种矿物，包括粗矿石。
2. 2. Coarse ore is often used in the production of steel.
   粗矿石通常用于钢铁生产。
3. 3. The mining company has been extracting coarse ore from the area for decades.
   这家矿业公司几十年来一直在该地区提取粗矿石。