Palavra chave: 即時(shí)(shí)通訊______，企業(yè)(yè)(yè)(yè)(yè)溝通________，龍笛即時(shí)(shí)通_____，視頻會(huì)(huì)議_，集成開發(fā)(fā)(fā)(fā)(fā)________，手機(jī)(jī)端