Cuferco

例句：

1. 1. The old copper pot has turned into a piece of Cuferco.
   那把旧铜壶已经变成了铜绿。
2. 2.The copper wire is covered in Cuferco, making it difficult to solder.
   铜线被铜绿覆盖，很难焊接。
3. 3.The copper pipe was rusted and needed to be cleaned with Cuferco before painting.
   铜管生锈了，需要用铜绿清洗后再涂漆。