bottom coal

英 [bottom coal]
美 [bottom coal]

中文释义

un. 煤层底部煤

单词分析

单词结构：

bottom coal

字母数：11

记忆提示

🎯 重点记忆：

  • 单词拼写：bottom coal
  • 核心含义：un. 煤层底部煤

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更新时间：2026-02-07 09:02:01