Palavra chave: 即時(shí)(shí)(shí)通訊_______________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通_________________________，龍笛即時(shí)(shí)(shí)通______________________，視頻會(huì)(huì)(huì)議_____________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)(fā)______________________，手機(jī)(jī)(jī)端