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