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