科研之友
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<正>Do you like milk?Do you know how to milk a cow?Where can you see a cow?你喜欢喝牛奶吗?你知道怎么挤牛奶吗?你在哪里能看见奶牛?Some people are good at swimming.Sometimes they spend much time swimming.But can cows swim?有些人擅长游泳,有时他们花很多时间去游泳。但是奶牛会游泳吗?It is said that fish are great swimmers1.But a lot of other animals are,too! Geese2 and crocodiles3 are doing well in the water.Others like polar bears4 and cows can swim,too.
