Mot-clefs : 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)________，手機(jī)(jī)端