clunis

例句：

1. 1. The old iron gate is covered in a thick layer of rust.
   那把旧铁门上覆盖着厚厚的一层锈。
2. 2. The car's engine has developed a rusty sound.
   这辆车的引擎发出了生锈的声音。
3. 3. The metal surface has turned into a beautiful shade of rust.
   金属表面已经变成了一种美丽的锈色。