nitratase

例句：

1. 1. Thebacteria in the soil are responsible for converting nitrate into ammonia.
   土壤中的细菌负责将硝酸盐转化为氨。
2. 2.Nitrates are important nutrients for plants and animals.
   硝酸盐对植物和动物都是重要的营养元素。
3. 3. The nitrate reductase is an enzyme that reduces nitrate to nitrite.
   硝化酶是一种将硝酸盐还原为亚硝酸盐的酶。