nitrogen reduction的用法和樣例：
例句
- Nitrification is an important step to affect nitrogen removal in biological treatment processes.
生物脫氮系統中，硝化作用好壞是影響脫氮工藝效率的重要步驟。 - Investigation of extracting nitrogen compounds by solvent complexation is now actively under way.
綜述了石油產(chǎn)品脫氮研究進(jìn)展，提出了催化裂化柴油絡(luò )合萃取脫氮的途徑。
