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