rust of pear

例句：

1. 1. The old car's engine has a lot of rust onit.
   这辆旧车引擎上有很多锈。
2. 2. The metal surface is covered in rustafter years of exposure to the elements.
   经过多年暴露于元素后，金属表面覆盖着锈。
3. 3. Rust can be prevented byregularly cleaning and maintaining the car.
   通过定期清洁和维护汽车可以防止生锈。