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