Schlüsselwort: 即時(shí)(shí)通訊___________________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通_________________________，龍笛即時(shí)(shí)通_______，視頻會(huì)(huì)議_______________________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)_________，手機(jī)(jī)端