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(kāi)發(fā)(fā)(fā)(fā)(fā)_____________，手機(jī)(jī)端