Well, microbes, which are microscopic organisms that live in the soil, allow the soil to have higher nitrogen levels, which plants require to survive.
微生物，即生活在土壤中微小有机物，使土壤中的氮含量更高，这是微生物生存所需要的。
| 单词 | nitrogen level |
| 释义 |
nitrogen level
原声例句
托福听力备考练习 Well, microbes, which are microscopic organisms that live in the soil, allow the soil to have higher nitrogen levels, which plants require to survive. 微生物，即生活在土壤中微小有机物，使土壤中的氮含量更高，这是微生物生存所需要的。 |
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