出处:按学科分类—语言、文字 中国对外翻译出版公司《汉英成语词典》第267页(195字)
形容物品十分贵重,例美术馆现在正在展览的画,都是价值连城,所以24小时均有警卫看守。
Since all the paintings on exhibition at the Art Gallery are priceless,they are guarded day and night.