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