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)(huì)議___________，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)_______________，金笛短信