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

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

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