Mot-clefs : 即時(shí)通訊__，企業(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)_____，手機(jī)(jī)(jī)端