part per billion 中文意思是什麼
part per billion
解釋
十億分率-
The fda has developed a method to confirm chloramphenicol levels in honey at one part per billion. the fda and customs are continuing to coordinate their enforcement strategies and will be detaining or seizing any honey imports that contain chloramphenicol to ensure that they are not released for human or animal consumption in the united states. ( end text )
美國食品和藥物管理局和美國海關仍在繼續協調執法行動計劃，並將扣押或查封任何含有氯黴素的進口蜂蜜，以保證這些產品不得在美國供消費者使用或用於喂養動物。 -
The average trend over 1980 to 1990 is about 13 ppbv year part per billion by volume year
1980至1990的平均增長速度是每年13ppbv十億份之一體積。 -
Your ear can pick up sound waves from air pressure changes as small as one part per ten billion
你的耳朵可以從空氣氣壓的幾百億分之一的變化中提取出聲波。 -
The average trend over 1980 to 1990 is about 13 ppbvyear ( part per billion by volumeyear )
1980至1990的平均增長速度是每年13ppbv （十億份之一體積） 。
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