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科技日新月异,特别是电子产品,请跟据一下表格内容，用英语描述计算机的发展变化。词数80左右，开头一给出，不计入总数内！ |
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computer The first computer Today*scomputer |
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Time In1940s Today |
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SIZE big（like a room） small |
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Weight heavy light |
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Speed slow fast |
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USE only in the lab； office，school，home； |
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difficult to use easy to use |