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