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