nitrate asphalt

例句：

1. 1. The soil was rich in nitrogen, which is an essential nutrient for plants.
   土壤富含氮，这是植物必需的营养元素。
2. 2.Nitrates are commonly found in fertilizers and are important for plant growth.
   硝酸盐通常存在于肥料中，对植物生长很重要。
3. 3.The city's water supply relies heavily on the treatment of wastewater, which contains nitrates.
   该市的供水主要依赖于处理废水，这些废水中含有硝酸盐。