ferrous dense material

例句：

1. 1. The steel is ferrous and strong.
   这种钢是铁质的，又很坚固。
2. 2. The soil is ferrous and suitable for growing crops.
   土壤含铁质，适合种植作物。
3. 3. This alloy is ferrous and has good wear resistance.
   这种合金含铁质，耐磨性好。