Palavra chave: 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)(jī)端