pphm

英 [pphm]
美 [pphm]

中文释义

abbr. parts per hundred million 亿分率(0.000001%)

单词分析

单词结构：

pphm

字母数：4

记忆提示

🎯 重点记忆：

  • 单词拼写：pphm
  • 核心含义：abbr. parts per hundred million 亿分率(0.000001%)

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更新时间：2025-12-14 08:02:14