noun 下载 🔗分享 卵生哺乳动物 A mammal that lays eggs and has a single urogenital and digestive orifice. Only the echidnas and platypuses are included in this group Examples : "In their biology class, the students learned that monotremes, such as echidnas and platypuses, are unique mammals because they lay eggs instead of giving birth to live young. " 在生物课上,学生们了解到像针鼹和鸭嘴兽这样的卵生哺乳动物是非常独特的哺乳动物,因为它们是产卵而不是直接生育幼崽的。 animal biology organism nature 与AI对话词汇游戏阅读练习