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