But scientists at Delaware State University have found that an ancient method of fertilizing soil may help.

不过特拉华大学的科学家们发现一种古老的方式或许对增加土壤肥沃有效。

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But scientists at Delaware State University have found that an ancient method of fertilizing soil may help.

不过特拉华大学的科学家们发现一种古老的方式或许对增加土壤肥沃有效。

youdao