feis

例句：

1. 1. The old car has a lot of rust on its body.
   这辆旧车车身有很多铁锈。
2. 2. The paint on the house is starting to turn rusty.
   房子上的油漆开始变黄了。
3. 3. He noticed that the metal door had a layer of rust on it.
   他注意到金属门上有一层面漆。