noun 下载 🔗分享 牛蛙 Any of various frogs having a croak that resembles the bellow of a cow or bull. Examples : "We heard a deep "bur-RUMP" coming from the pond; it was the sound of a bullfrog. " 我们听到池塘里传来低沉的“咕隆”声;那是牛蛙的叫声。 animal organism sound nature biology 与AI对话词汇游戏阅读练习