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