キーワード: 即時(shí)(shí)(shí)通訊_______________，企業(yè)(yè)(yè)(yè)(yè)(yè)溝通___________________，龍笛即時(shí)(shí)(shí)通__________，視頻會(huì)(huì)議____________，集成開(kāi)(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)___________，金笛短信