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