naturally occurring radioactive substance

英 [naturally occurring radioactive substance]
美 [naturally occurring radioactive substance]

中文释义

天然放射性物质

单词分析

单词结构：

naturally occurring radioactive substance

字母数：41

记忆提示

🎯 重点记忆：

  • 单词拼写：naturally occurring radioactive substance
  • 核心含义：天然放射性物质

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更新时间：2025-12-16 16:40:06