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_________________，視頻會議_______，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)_______________________，金笛短信