キーワード: 即時(shí)(shí)(shí)(shí)通訊___________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通__________________，龍笛即時(shí)(shí)(shí)(shí)通_____________，視頻會(huì)議___________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)_________，金笛短信