过去分词：nitrified 现在分词：nitrifying 第三人称单数：nitrifies
1.【化】硝化;(使)变成硝石
1.to oxidize ammonia ions into nitrite or nitrate ions, as nitrobacteria do
2.to treat or combine something with nitrogen or nitrogen compounds
3.to introduce nitrogen or nitrogen compounds into the soil in order to increase fertility
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