英语词汇“parts per million (ppm)”的翻译、意思、用法、释义-英汉汉英词典

单词	parts per million (ppm)
释义	parts per million (ppm)百万分率parts per million (ppm)百萬分之容量比機械工程parts per million (ppm)百萬分率氣象學名詞
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