1. Nitrites are commonly used as food preservatives to prevent bacterial growth.
硝酸盐常用作食品防腐剂，以防止细菌生长。

2. High levels of nitrites in water can be harmful to aquatic life.
水中高浓度的硝酸盐对水生生物有害。

3. Nitrites can react with hemoglobin in the blood to form methemoglobin.
硝酸盐可以与血液中的血红蛋白反应，形成高铁血红蛋白。

4. The use of nitrites in curing meat helps to prevent the growth of harmful bacteria.
在腌制肉类中使用硝酸盐有助于防止有害细菌的生长。

5. The presence of nitrites in sewage can indicate contamination from agricultural runoff.
污水中硝酸盐的存在可能表明受到农业径流的污染。

6. Some people may be sensitive to nitrites and experience adverse reactions after consuming foods containing them.
有些人可能对硝酸盐敏感，在食用含硝酸盐的食物后出现不良反应。