Mot-clefs : 即時(shí)通訊______，企業(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)__，手機(jī)端