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(huì)議__________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)_____，手機(jī)(jī)端