Palavra chave: 即時通訊__________________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通_____，龍笛即時通______________________，視頻會議_____________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)(fā)__________________，手機(jī)端