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_________，視頻會議________________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)_____________，金笛短信