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｝百万分之几parts per million ｛=ppm｝百萬分之幾海洋科學名詞—兩岸海洋科學名詞
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