CanyouimaginewhatEdison’slifewaslikeintheyearsafterheha...
问题详情：CanyouimaginewhatEdison’slifewaslikeintheyearsafterhehadinventedtheelectriclamp？Manythingshadtobeinventedandbuiltbeforeelectriclampscouldreallybeusedbyall.Everythingwhichwasneededhadtobethough...