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)議____________________，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)(fā)______________，金笛短信