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(huì)議______，集成開發(fā)(fā)(fā)(fā)(fā)(fā)_____________________，手機(jī)端