Mot-clefs : 即時(shí)通訊_______________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通____________，龍笛即時(shí)通____________________________，視頻會議__________________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)_______________________，手機(jī)(jī)(jī)端