Mot-clefs : 即時(shí)(shí)通訊__________________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通______________，龍笛即時(shí)(shí)通_____________________，視頻會(huì)議______________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)(fā)______________________，手機(jī)(jī)(jī)端