她的裙子上有块蓝色的污渍，看起来像是颜料溅上去的。

There was a blue ___blotch on her dress, looking like spilled paint.

他的衬衫上有一块红酒渍。

There's a red wine ___blotch on his shirt.

她脸上的那块红斑让她很困扰。

The red ___blotch on her face made her feel self-conscious.