under color removal

例句：

1. 1. The paint on the wall has been removed under color removal.
   墙上的油漆在去色处理后已被去除。
2. 2. During the process of removing color, the material is often treated with chemicals to remove any remaining stains.
   在去色过程中，该材料通常用化学物质进行处理以去除任何残留的污渍。
3. 3.The company uses a special technique to remove color from fabrics before they are dyed.
   该公司使用一种特殊技术，在给织物染色之前先去除颜色。