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