キーワード: 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__________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)_________________，手機(jī)(jī)端