nitrous acid

例句：

1. 1.This chemical is used in the production of fertilizers and in the synthesis of nitric acid.
   这种化学物质用于生产肥料和硝酸的合成。
2. 2. Nitric oxide is a colorless gas that reacts with oxygen to form nitrogen dioxide.
   一氧化二氮是一种无色气体，与氧气反应生成二氧化氮。
3. 3. The reaction between nitric oxide and oxygen is responsible for the formation of ozone, which is a powerful greenhouse gas.
   一氧化二氮与氧气的反应是臭氧形成的原因，臭氧是一种强大的温室气体。