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)端