noun🔗Share哺乳动物 An animal of the class Mammalia, characterized by being warm-blooded, having hair and feeding milk to its young."The dog is a mammal because it is warm-blooded, has fur, and nurses its puppies. "狗是哺乳动物，因为它体温恒定，身上有毛，而且用奶喂养小狗。animalbiologyorganismChat with AIVocabulary GamePractice Reading
noun🔗Share哺乳动物，哺乳类。 A vertebrate with three bones in the inner ear and one in the jaw."The zookeeper pointed out that the animal was a mammal because it had three tiny bones in its inner ear. "动物园管理员指出这种动物是哺乳动物，因为它内耳里有三块微小的骨头。animalbiologyorganismphysiologyanatomyChat with AIVocabulary GamePractice Reading
