キーワード: 即時(shí)(shí)通訊________________，企業(yè)(yè)(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)(fā)(fā)_____________________，手機(jī)(jī)(jī)(jī)端