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