キーワード: 即時(shí)(shí)通訊______，企業(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)____，金笛短信