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______________，集成開發(fā)(fā)(fā)(fā)(fā)__________，金笛短信