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_____________________，視頻會議_____________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)_______，手機(jī)端