bottom layer of subgrade

英 [bottom layer of subgrade]
美 [bottom layer of subgrade]

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基床底层

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单词结构：

bottom layer of subgrade

字母数：24

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🎯 重点记忆：

  • 单词拼写：bottom layer of subgrade
  • 核心含义：基床底层

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更新时间：2025-12-14 18:34:59