キーワード: 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)議________________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)(fā)____________________，手機(jī)(jī)(jī)(jī)端