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)(jī)(jī)端