tengluozi

例句：

1. 1.The old iron door has a lot of rust on it.
   这把旧铁门上有很多锈。
2. 2.The car's engine is rusty and needs to be cleaned.
   这辆车的引擎生锈了，需要清理。
3. 3.The old iron railings are rusted and need to be replaced.
   那根旧铁栏杆生锈了，需要更换。