英语词汇nitrogen level简单造句、意思、用法及例句-英语例句辞典

单词	nitrogen level
例句	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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