noun 下载 🔗分享 食人鱼,水虎鱼。 Any of the carnivorous freshwater fish living in South American rivers and belonging to the subfamily Serrasalminae. Examples : "The biologist studied the piranha in the Amazon River. " 生物学家在亚马逊河研究食人鱼(水虎鱼)。 fish animal biology nature 与AI对话词汇游戏阅读练习