亚硝酸盐

例句：

1. 1. The chemical is commonly used in fertilizers to enhance soil fertility.
   这种化学物质常用于肥料中，以增强土壤肥力。
2. 2. In the production of meat, it is important to control the levels of nitrate and nitrite in the feed.
   在肉类生产过程中，控制饲料中的硝酸盐和亚硝酸盐水平非常重要。
3. 3. Some bacteria can convert nitrite into nitric oxide, which can be harmful to humans.
   某些细菌可以将亚硝酸盐转化为一氧化氮，对人类可能有害。