キーワード: 即時(shí)通訊____________________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通____________，龍笛即時(shí)通__________________，視頻會議_______________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)_____________________，金笛短信