キーワード: 即時(shí)(shí)通訊______________________，企業(yè)(yè)(yè)(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)(fā)(fā)(fā)__________________，金笛短信