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单词
ppb (part per billion)
释义
ppb (part per billion)
网络
十亿分之;十亿分一
网络释义
1.
十亿分之
ppm ppb ... ... ppm part per million 百万分之……
ppb part per billion
十亿分之
…… ppt part per trillion 万亿分之…
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2.
十亿分一
各种单位符号一... ... CONCENTRATION IN A SOLUTION 硷度的数值
ppb PART PER BILLION
十亿分一
ppm PART PER MIL…
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例句
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更新时间:2025/8/11 14:44:05