n. any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk
n. 哺乳动物
[化] 哺乳动物
1. A dog is a type of mammal that is often kept as a pet.
狗是一种常被当作宠物的哺乳动物。
2. Mammals usually give birth to live young instead of laying eggs.
哺乳动物通常是生下活的幼崽，而不是下蛋。
3. The elephant is the largest land mammal in the world.
大象是世界上最大的陆生哺乳动物。