英语词汇“parts per billion {= ppb}”的翻译、意思、用法、释义-英汉汉英词典

单词	parts per billion {= ppb}
释义	parts per billion {= ppb}十亿分点parts per billion {= ppb}十億分點高中以下化學名詞parts per billion {= ppb}十億分點化學名詞—化學術語
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