ferrohumite

例句：

1. 1.The iron oxide in the soil is a key factor in plant growth.
   土壤中的氧化铁是植物生长的关键因素。
2. 2.The iron oxide layer on the surface of the rock protects it from corrosion.
   岩石表面的氧化铁层保护它免受腐蚀。
3. 3.Iron oxide is used as a pigment in paints and ceramics.
   氧化铁被用作油漆和陶瓷的颜料。