rust of broad bean

例句：

1. 1. The old car's engine has a lot of rust on it.
   这辆旧车发动机上有很多锈。
2. 2. The metal was exposed to the rain for too long, causing it to rust.
   金属暴露在雨水中太久，导致生锈。
3. 3. The paint job on the car looks like it needs to be reapplied after a while, as it has started to rust.
   汽车上的油漆看起来需要一段时间后重新涂抹，因为它已经开始生锈了。