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)端