Mot-clefs : 即時(shí)(shí)(shí)通訊___________，企業(yè)(yè)(yè)(yè)(yè)溝通_____________，龍笛即時(shí)(shí)(shí)通___________，視頻會(huì)(huì)(huì)議_________，集成開發(fā)(fā)(fā)(fā)(fā)______，手機(jī)(jī)(jī)端