Mot-clefs : 即時(shí)(shí)通訊_______，企業(yè)(yè)(yè)(yè)溝通__________，龍笛即時(shí)(shí)通_____，視頻會(huì)議___，集成開(kāi)發(fā)(fā)(fā)(fā)________，手機(jī)(jī)(jī)(jī)端