Schlüsselwort: 即時(shí)通訊____，企業(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)_________，金笛短信