Schlüsselwort: 即時通訊____________________，企業(yè)(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)(fā)____________________，金笛短信