Palavra chave: 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)(jī)端