troegerite

例句：

1. 1. The old iron gate is covered in a thick layer of troegerite.
   那把旧铁门上覆盖着厚厚的一层铁锈。
2. 2. The car's engine was rusted beyond repair.
   这辆车的引擎已经锈得无法修复了。
3. 3. The old barn has been left to the troegerite for years.
   那间老谷仓已经被铁锈侵蚀了多年。