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