Schlüsselwort: 即時(shí)通訊_____________，企業(yè)(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)(fā)________，金笛短信