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)端