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