キーワード: 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