natural activity

英 [natural activity]
美 [natural activity]

中文释义

天然放射性

单词分析

单词结构：

natural activity

字母数：16

记忆提示

🎯 重点记忆：

  • 单词拼写：natural activity
  • 核心含义：天然放射性

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更新时间：2025-12-12 21:06:16