heterotrophic nitrification

例句：

1. 1. Heterotrophic nitrification is a crucial process in the nitrogen cycle.
   异养硝化作用是氮循环中至关重要的过程。
2. 2.The bacteria responsible for heterotrophic nitrification play a vital role in wastewater treatment.
   负责异养硝化作用的细菌在废水处理中起着至关重要的作用。
3. 3.In heterotrophic nitrification, organic matter is converted into nitrate and nitrite by bacteria.
   在异养硝化作用中，有机物质被细菌转化为硝酸盐和亚硝酸盐。