キーワード: 即時(shí)(shí)通訊______________，企業(yè)(yè)(yè)(yè)(yè)(yè)溝通______________，龍笛即時(shí)(shí)通____，視頻會(huì)議_____________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)_____________，金笛短信