mammal
/ˈmæməl/
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
中文释义：哺乳动物
Whales are mammals that live in the ocean, not fish.
鲸鱼是生活在海洋中的哺乳动物，而不是鱼。
All mammals have hair or fur and produce milk for their young.
所有哺乳动物都有毛发或皮毛，并为幼崽产奶。