noun 下载 🔗分享 河马 A large, semi-aquatic, herbivorous (plant-eating) African mammal (Hippopotamus amphibius) Examples : "The zookeeper fed the hippopotamus a large pile of hay. " 动物园管理员给河马喂了一大堆干草。 animal organism nature environment biology 与AI对话词汇游戏阅读练习