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冬天来了,有的同学整天戴着一副厚厚的手套,写作业时,感觉手很笨拙。所以,我想发明一种冷暖笔。它会在寒冷
Winter came, some students wearing a thick glove all day, writing homework, I feel very clumsy hands. So, I want to invent a warm and cold pen. It will be cold