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