nitration acid heat test

例句：

1. 1.The process of nitration is crucialfor the production of nitric acid.
   硝化过程对于生产硝酸至关重要。
2. 2. Thenitration of the metal surface causes itto react with oxygen and form a protectivelayer.
   金属表面的硝化使其与氧气反应形成保护层。
3. 3. The nitrationof the soil can lead to increased fertility and improved crop yields.
   土壤的硝化可以增加肥力和提高作物产量。