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