Soil should also be tested for its pH level, a measure of the acid and alkaline balance.

土壤的PH 值也应该测量一下， PH 水平是反映酸碱平衡的量度。

youdao

When acid rain falls on forest floors, it changes the ingredients - the 'PH level' - of the soil.

酸雨对森林地表层的土壤来说，它改变了原来的pH值'。

youdao

At a mean pH level of 7.8, calcified organisms begin to disappear, and non calcifying ones take over.

在pH平均值为7.8时，钙化生物体开始消失，代之而来的是非钙化生物体。

youdao

Experts say the ability to take up lead is reduced when the pH level is above six and a half.

VOA: special.2009.06.09

But, in general, you know, the diversity, especially at Ph.D. level is very, very large,

但是，总的来说，尤其是在博士阶段，学校的多元化程度还是很高的，

如果是在考虑留学 - SpeakingMax英语口语达人

Soil should also be tested for its pH level, a measure of the acid and alkaline balance.

VOA: special.2009.06.09

The solution undergoes further processing to stabilize the ions and to adjust the pH level.

FORBES: Holy Water

The lower pH level also enables the cancer to spread by using acid dissolved normal cells as its food source.

FORBES: Does genetically modified corn cause cancer? A flawed study fails to convince.

Mr. Marcus said a restaurant operator can demonstrate that the pH level of kimchi is below 4.6 as an alternative to following the time and temperature rules.

WSJ: Restaurants: City Failing on Kimchi