nitrite number

例句：

1. 1. The food was contaminated with nitrites, which could be harmful to human health.
   食物被亚硝酸盐污染，对人类健康有害。
2. 2.The manufacturer tested the product for nitrite content to ensure it met safety standards.
   制造商对产品进行了亚硝酸盐含量测试，以确保其符合安全标准。
3. 3. The nitrite content in the soil is a critical factor affecting plant growth and yield.
   土壤中的亚硝酸盐含量是影响植物生长和产量的关键因素。