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