rust spot

例句：

1. 1. The old car has a rust spot on the door.
   这辆旧车车门上有锈斑。
2. 2.The paint job on the car looks like it needs some rust spot removal.
   这辆车的油漆看起来需要去除一些锈斑。
3. 3.The rust spot on the metal surface is due to exposure to moisture.
   金属表面的锈斑是由于暴露在湿气中造成的。