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