キーワード: 即時(shí)通訊_______________，企業(yè)(yè)(yè)(yè)(yè)(yè)溝通__________________，龍笛即時(shí)通_______________，視頻會(huì)議___________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)_____________，金笛短信