Definition: a small area that is different from the area around it Level: C2
他头上有一块秃斑。
He has a bald ___patch on his head.
小心路上的结冰路段。
Watch out for icy ___patches on the road.
锻炼后，他的衬衫上留下了汗渍。
He had sweat ___patches on his shirt after the workout.
