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