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  • Edison started his own laboratory at Menlo Park, New Jersey. He hired mechanics and chemists to help him.

    爱迪生在新泽西的门洛帕克建立了自己的实验室，他雇佣了机械工和化学师帮忙，他没日没夜地工作。

    youdao

  • Edison started his own laboratory at Menlo Park, New Jersey. He hired mechanics and chemists to help him.

    爱迪生在新泽西的门洛帕克建立了自己的实验室，他雇佣了机械工和化学师帮忙，他没日没夜地工作。

    youdao

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