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单词
ppb (parts per billion)
释义
ppb (parts per billion)
网络
十亿分之几
网络释义
1.
十亿分之几
化工设备常用词汇和缩写中英文... ... Posit Position 位置
ppb Parts per billion
十亿分之几
ppm Parts per million 百万分之几 ...
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例句
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achromatic figure
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achromaticity
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achromatic prism
英汉双解词典包含2704715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。
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更新时间:2025/8/20 6:58:08