英语词汇“ppb”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

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)
随便看	fourth finger fourth-finger fourth form fourth grade fourth-grader fourth international fourthly fourth official fourth-official fourth of july fourth position fourth-rate fourth republic fourth wall fourth world four-walling four-way four-way stop four-wheel four-wheel drive four-wheel-drive foussa fouter fouth foutra

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ppb in American English