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)______________，手機(jī)端