hard as the nether millstone

• 冷酷无情的

hard as the nether millstone的用法和样例：

例句

1. He is as hard as flint where business is concerned.
   他在生意上是冷酷无情的。
2. Her story should soften the stoniest of hearts.
   她的事情会使心情最冷酷无情的人也为之感动的。

词汇搭配

• as hard as the nether millstone 铁石心肠的