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(huì)議__________________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)________________，金笛短信