请输入您要查询的英文单词:
单词
ppb
释义
ppb
in American English
parts per billion
Examples of 'ppb' in a sentence
ppb
Concentrations of methane have risen from 700 parts per billion (ppb) to 1,745 ppb.
Times, Sunday Times
(
2009
)
Laboratory analysis is done on samples that are 100 ppb and below using atomic absorption spectrophotometry.
The Scientist
(
2000
)
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amapá
amaracus
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amarantaceous
amaranth
amaranthaceous
amaranthine
amarantin
amarantine
amarelle
amaretti
amaretto
amarillo
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amarone
a married man/woman
a martyr to something
amaryllid
amaryllidaceous
amaryllis
amaryllis family
a masked man
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更新时间:2025/6/15 11:11:29