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