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harmful element in coal

英 [harmful element in coal]
美 [harmful element in coal]

中文释义

煤中有害元素

单词分析

单词结构:

harmful element in coal

字母数:23

记忆提示

🎯 重点记忆:

  • 单词拼写:harmful element in coal
  • 核心含义:煤中有害元素

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更新时间:2026-02-01 12:24:38

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