Schlüsselwort: 即時(shí)通訊______________________，企業(yè)(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)(fā)_______________________，手機(jī)(jī)端