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