parts per million

英 [parts per million]
美 [parts per million]

中文释义

[医] 兆比率(百万分之几)

单词分析

单词结构：

parts per million

字母数：17

记忆提示

🎯 重点记忆：

  • 单词拼写：parts per million
  • 核心含义：[医] 兆比率(百万分之几)

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更新时间：2026-03-17 11:21:30