| 释义 | 
             
                nitrogen heterocycles
                
            氮气dàn qì 
 nitrogen氨基氮ān jī dàn 
 amino nitrogen; ammonia nitrogen氮dàn 
 azote; nitrogen固氮gù dàn 
 nitrogen fixation铵态氮ǎn tài dàn 
 ammonium nitrogen氮平衡dàn píng héng 
 nitrogen balance固氮作用gù dàn zuò yòng 
 nitrogen fixation氮化处理dàn huà chù lǐ 
 nitriding; nitrogen treatment氮测定器dàn cè dìng qì 
 apparatus for nitrogen examination; nitrometer
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