キーワード: 即時(shí)通訊_______________，企業(yè)(yè)(yè)(yè)(yè)(yè)溝通________，龍笛即時(shí)通__________________，視頻會(huì)議____，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)___________，金笛短信