英语语法分析

Urease activity falls with the soil depth.

脲酶活性随土壤深度加深而降低。

The activity of urease is sensitive to bronopol.

尿素酶的活性对溴硝醇比较敏感。

Objective: To detect the expression of urease genes in Citrobacter.

目的：研究尿素酶基因在枸橼酸杆菌中的表达情况。