rust of sunflower

例句：

1. 1. The old car's engine was rusted beyond repair.
   这辆旧车的发动机锈得无法修复了。
2. 2. The metal parts on the ship were badly rusted.
   船上的金属部件严重生锈了。
3. 3. To prevent rust, it is important to keep the metal surfaces clean and dry.
   为了防止生锈，保持金属表面清洁干燥是很重要的。