キーワード: 即時(shí)(shí)(shí)通訊_____，企業(yè)(yè)(yè)溝通________，龍笛即時(shí)(shí)(shí)通_______，視頻會(huì)(huì)(huì)議____，集成開(kāi)(kāi)發(fā)(fā)(fā)_____，金笛短信