Mot-clefs : 即時(shí)通訊_________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通________________，龍笛即時(shí)通_______________________，視頻會(huì)議____，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)______________________，手機(jī)端