Schlüsselwort: 即時(shí)通訊___________________，企業(yè)(yè)(yè)(yè)(yè)(yè)溝通___________________，龍笛即時(shí)通_______，視頻會(huì)議_____________，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)______________，金笛短信