Schlüsselwort: 即時(shí)通訊___________，企業(yè)(yè)(yè)(yè)(yè)(yè)溝通____________，龍笛即時(shí)通________________，視頻會(huì)議_______________，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)_________，金笛短信