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