英语语法分析

The mutagenicities of these extracts after nitrosation were about 5 times higher than that of the original shrimp sauce.

亚硝化处理后，其诱变性较虾酱直接亚硝化时高5倍左右。

This paper discussed the influence on the biochemical oxygen demand, ammoniation and nitrosation by barium of different levels in water.

本文就不同浓度的钡对天然水的生化需氧过程、氨化及亚硝化过程的影响进行了探讨。

Therefore, it may be concluded that control of aerobic reaction ending at nitrosation stage is the key to the maintenance and stabilization of short-cut nitrification.

因此可以得出，好氧反应时间的控制在亚硝化阶段基本结束时是维持并稳定短程硝化的关键。