“污斑”造句

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.