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(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)______________，金笛短信