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