キーワード: 即時(shí)通訊_________________，企業(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)___________，金笛短信