Mot-clefs : 即時(shí)通訊____________，企業(yè)(yè)(yè)(yè)(yè)(yè)溝通________，龍笛即時(shí)通_________________，視頻會議____，集成開發(fā)(fā)(fā)(fā)(fā)(fā)____，手機(jī)(jī)端