Schlüsselwort: 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)_______________________，金笛短信