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