Mot-clefs : 即時(shí)通訊______，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通________________________，龍笛即時(shí)通___________________________，視頻會(huì)議_______，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)(fā)_________________，手機(jī)(jī)端