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______________________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)_________________，手機(jī)端