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)(huì)議__________，集成開(kāi)(kāi)發(fā)(fā)(fā)(fā)_，手機(jī)(jī)(jī)(jī)端