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_______，集成開發(fā)(fā)(fā)(fā)(fā)____，手機(jī)(jī)端