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(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)(fā)(fā)____________，手機(jī)(jī)端