largest North American frog; highly aquatic with a deep-pitched voice
同义词：Rana catesbeiana
bullfrog例句
A bullfrog was croaking in the distance.
一只牛蛙在远处呱呱地叫。
bullfrog详细解释
bull.frog 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 属，尤指 牛蛙 原产于北美，有很具特色的低沉的，洪亮的叫声
