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(huì)(huì)議____________，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)(fā)_________，金笛短信