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