例句與造句

1. Biochemically, ammonia oxidation occurs by the stepwise oxidation of ammonia to hydroxylamine ( ) by the enzyme ammonia monooxygenase in the cytoplasm, followed by the oxidation of hydroxylamine to nitrite by the enzyme hydroxylamine oxidoreductase in the periplasm.
2. It's difficult to find stepwise oxidation in a sentence. 用stepwise oxidation造句挺難的