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(huì)議_____________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)(fā)_______________________，手機(jī)端