“污斑”怎么读

“污斑”的英语可以翻译为：stain，clouding，blotch ...

我们得用涂料把墙壁上的污斑遮盖住.We'll have to paint over the dirty marks on the wall.这些污斑去不掉.These dirty spots won't come out.皮肤上出现污斑是许多皮肤病的症状.Blotchy skin is a symptom of many skin diseases....