Schlüsselwort: 即時通訊_____________________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通_________________，龍笛即時通_________________，視頻會議____________________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)__________________，金笛短信