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