Schlüsselwort: 即時(shí)(shí)通訊__________________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通__________________________，龍笛即時(shí)(shí)通________________，視頻會議_____________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)____________，金笛短信