ppmv是什么意思 ppmv的读音、翻译、用法

ppmv是什么意思 ppmv的读音、翻译、用法

'ppmv'是英语词汇,意为“每百万体积”,是一种描述气体浓度的单位。通常用于描述空气中的污染物浓度。

使用方法:将某种化学物质在空气中的体积(毫升)除以空气的体积(立方米),再乘以100万,即得ppmv。

例句:

1. The concentration of carbon monoxide in the air is measured in parts per million volume (ppmv). 空气中一氧化碳的浓度以百万体积为单位进行测量。

2. The ozone concentration is rarely more than 0.1 ppmv. 臭氧浓度很少超过0.1百万体积。

3. The highest concentrations of sulfur dioxide were detected to be approximately 0.03 ppmv. 硫二氧化物的最高浓度检测到大约为0.03百万体积。

4. The typical concentration of methane in the atmosphere is around 1.7 ppmv. 大气中甲烷的典型浓度约为1.7百万体积。

5. The permitted concentration of NO2 in the workplace is 0.005 ppmv. 工作场所允许的二氧化氮浓度为0.005百万体积。

6. The concentration of carbon dioxide in the atmosphere has increased by about 40% since the industrial revolution, from 280 ppmv to 400 ppmv. 自工业革命以来,大气中二氧化碳浓度已增加约40%,从280百万体积增加到400百万体积。

7. The concentration of lead in the air is typically measured in micrograms per cubic meter or parts per billion by volume (ppbv) or parts per million by volume (ppmv). 空气中铅的浓度通常以每立方米微克或百亿体积为单位进行测量。

8. The average concentration of nitrogen oxides in urban areas ranges from 20 to 30 ppmv. 城市地区的氮氧化物平均浓度范围从20到30百万体积。

9. The concentration of volatile organic compounds (VOCs) in indoor air is typically between 0.1 and 1 ppmv. 室内空气中挥发性有机化合物(VOC)的浓度通常在0.1至1百万体积之间。



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