as hard as a nether millstone

英 [as hard as a nether millstone]
美 [as hard as a nether millstone]

中文释义

铁石心肠

单词分析

单词结构：

as hard as a nether millstone

字母数：29

记忆提示

🎯 重点记忆：

  • 单词拼写：as hard as a nether millstone
  • 核心含义：铁石心肠

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更新时间：2026-02-20 08:38:31