as hard as the nether millstone

• adj. 铁石心肠的

as hard as the nether millstone的用法和样例：

例句

用作形容词 (adj.)

1. The dictator was a man of great hardness of heart.
   那个独裁者是一个铁石心肠的人。
2. One would need to have a heart as hard as stone not to be moved by his pitiable plight.
   他的境况十分可怜，只有铁石心肠的人才会不为所动。

词汇搭配

• hard as the nether millstone 冷酷无情的