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)(jī)端