CanyouimaginewhatEdison’slifewaslikeintheyearsafterheha...
問題詳情:CanyouimaginewhatEdison’slifewaslikeintheyearsafterhehadinventedtheelectriclamp?Manythingshadtobeinventedandbuiltbeforeelectriclampscouldreallybeusedbyall.Everythingwhichwasneededhadtobethough...