キーワード: 即時(shí)(shí)通訊_____，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通____________________，龍笛即時(shí)(shí)通________，視頻會(huì)(huì)議____________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)________________，金笛短信