n. 牛蛙, 喧蛙
- largest North American frog; highly aquatic with a deep-pitched voice
- A bullfrog was croaking in the distance.
n.（名词）Any of several large, heavy-bodied frogs, chiefly of the genusRana
and especially R. catesbeiana,
native to North America and having a characteristic deep, resonant croak. 牛蛙：一种大的，体重的蛙，蛤蟆