Mot-clefs : 即時(shí)通訊_______________，企業(yè)(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)(fā)___________________，手機(jī)端