キーワード: 即時(shí)(shí)通訊______，企業(yè)(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)(fā)_________，金笛短信