Mot-clefs : 即時(shí)通訊__________________，企業(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)____________，手機(jī)(jī)(jī)端