キーワード: 即時(shí)通訊__________________，企業(yè)(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)(fā)__________________，手機(jī)(jī)(jī)端