锍

例句：

1. 1. The old car has a lot of rust on the body.
   这辆旧车车身有很多锈。
2. 2. The rusted metal was difficult to remove.
   生锈的金属很难去除。
3. 3. Iron is a good material for making tools and weapons.
   铁是一种制作工具和武器的好材料。