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