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)(huì)議_________________，集成開(kāi)(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)____________，手機(jī)(jī)(jī)端