Mot-clefs : 即時(shí)通訊___，企業(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)________，手機(jī)端