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