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