英语词汇parts per hundred million concentration的读音、用法、中文释义、短语词组及例句-英汉双解词典

单词	parts per hundred million concentration
释义	parts per hundred million concentration 释义 [医]pphm浓度
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英汉双解词典包含4367426条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。