ppm meaning in English
p.p.m. ＝parts per million 百万分率。
Examples
- The term parts per million(ppm) was widely used but frequently led to misinterpretation .
广泛使用百分之几（ppm）表示结果，但常常引起误解。 - Concentrations of 10 ppm can be endured for only a few minutes and cause profuse lacrimation in all people .
10ppm的浓度，只需几分钟，就会使所有的人流泪不止。 - If a bay is inclined to the general line of the base at an angle of 10 mm in 24m, the error will be 0. 1 ppm .
如果一个尺段偏离基线总方向的角度相应于24米距离上的10毫米，则误差为0110-6。 - These decrements in intellectual behavior were found in firemen exposed to carbon monoxide at 100 ppm for varying periods of time .
在不定期地暴露于100ppm浓度的一氧化碳的瓦斯检验员中，发现了这种智力行为的衰退。 - Daily inhalation of 45 to 100 ppm for several hours has been associated with symptoms of irrifability, anorexia, headache, giddness, and emotional instability .
每天吸收45至100ppm几小时，会引起各种症状，如刺激性食欲不振，头疼，眩晕和情绪不稳定等。