salt mine

基本解释

That is, until Union forces mounted an attack on his salt mine and he had to flee once more.
直到联盟军又对他的盐矿发起的进攻他不得不有一次开始逃亡。
Their daughter works in the company’s sales department and their son works in the island’s salt mine.
他们的女儿在公司的销售部工作，儿子则在盐矿工作。
The salt mine was mentioned in official documents dating from the middle of the 13th century, when the mine was offered to the Transylvanian Catholic Church leaders.
在13世纪中期的官方文件中曾提及过此盐矿，它在被献给了当时特兰西瓦尼亚的天主教皇。

Today, the library--one of the largest television collections in history--is stored 54 stories underground in a climate-controlled salt mine near Kansas City, Kan.
FORBES: Wheeerrre's Johnny?
Their proposals include cutting opening hours by 16% and reducing staff and access to documents, some of which will be stored in a Cheshire salt mine.
ECONOMIST: Trouble at the National Archives