Palavra chave: 即時(shí)(shí)通訊__________，企業(yè)(yè)(yè)(yè)(yè)(yè)溝通_________________，龍笛即時(shí)(shí)通_，視頻會(huì)(huì)議_________________，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)__________，手機(jī)(jī)端