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