nitrogen balance造句

1、Try to clarificate the mechanism of negative nitrogen balance after burns.
目的：为阐明及防治烧伤后负氮平衡提供理论依据。

2、Methods Nitrogen balance test was used.
方法氮平衡试验。

3、The negative nitrogen balance of control group was more seriously than PN group(P
术后PN支持组的负氮平衡改善较常规补液组明显（P＜0.05）。