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)(huì)議____________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)________，金笛短信