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pdb (peedee belemnite) standard

英 [pdb (peedee belemnite) standard]
美 [pdb (peedee belemnite) standard]

中文释义

芝加哥箭石标准

单词分析

单词结构:

pdb (peedee belemnite) standard

字母数:31

记忆提示

🎯 重点记忆:

  • 单词拼写:pdb (peedee belemnite) standard
  • 核心含义:芝加哥箭石标准

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更新时间:2026-02-24 08:20:13

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