mam.mal 5mAm7[l n [C] any animal in which the female gives birth to babies, not eggs, and feeds them on milk from her own body 哺乳动物 Humans, dogs, elephants and dolphins are all mammals, but birds, fish and crocodiles are not. 人类，狗和海豚都是哺乳动物，而鸟，鱼和鳄鱼不是。