英语语法分析

We call all of this the land phase of the Phosphorus cycle.

我们把这称为磷循环的陆地阶段。

Soils are most commonly deficient in nitrogen and phosphorus.

土壤最经常缺乏氮和磷。

Soil samples from these pens or corrals show ten times the concentration of phosphorus.

来自这些围栏或畜栏的土壤样本显示，磷的浓度是其10倍。