2. 外语
  3. New inventions are appearing every day to make our lives easier, longer, warmer, speedier and so on. But only a few inventors de

New inventions are appearing every day to make our lives easier, longer, warmer, speedier and so on. But only a few inventors de

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问题    New inventions are appearing every day to make our lives easier, longer, warmer, speedier and so on. But only a few inventors design a new machine or product that becomes so well-known that the invention, named after its creator, becomes a household wo
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