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