Schlüsselwort: 即時(shí)(shí)通訊____，企業(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)__________，金笛短信