Palavra chave: 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________________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)______________，金笛短信