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