blotch|blotched|blotches

他的衬衫上有一块红酒渍。

There's a red wine ___blotch on his shirt.

那片树叶因为虫害而布满了斑点。

The leaf was ___blotched with spots due to insect damage.

这件旧衬衫上有几块黄色的污渍。

There are several yellow ___blotches on this old shirt.