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Mammals
哺乳動物
What animals can produce milk for their babies? Mammals.
什么動物能為它們的寶寶產奶?哺乳動物。
Dogs, pigs, elephants, lions, dolphins and bats are examples of mammals.
豬，狗，大象，獅子，海豚和蝙蝠都是哺乳動物。
Humans are also a kind of mammal.
人類也是一種哺乳動物。
Female mammals have a specialized organ that makes milk.
雌性哺乳動物有一種專門的器官能產奶。
There are over 4200 species of mammals.
哺乳動物有4200多種。
The largest mammals are blue whales.
最大的哺乳動物是藍鯨。
They are up to 33 meters long and weigh over 170 tons.
它們體長33米，重170多噸。
The bumble bee bats are known to be the smallest mammals.
大黃蜂蝙蝠被公認是最小的哺乳動物。
They weigh less than 2 grams, so they are lighter than a coin.
它們的體重不到2克，比一枚硬幣還輕。
