sorbierite

例句：

1. 1. The old iron door is covered in a thick layer of sorbierite.
   那扇旧铁门上覆盖着厚厚的一层铁锈。
2. 2. The paint on the fence has started to turn sorbierite.
   篱笆上的油漆开始变成铁锈了。
3. 3. The car's engine was sorbierite-covered after years of use.
   这辆车经过多年使用后，引擎上满是铁锈。