parts per trillion

英 [parts per trillion]
美 [parts per trillion]

中文释义

兆分之

单词分析

单词结构：

parts per trillion

字母数：18

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🎯 重点记忆：

  • 单词拼写：parts per trillion
  • 核心含义： 兆分之

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更新时间：2026-02-22 03:30:54