详细解释:n. 氮
【化】 氮N-2
【医】 氮(7号元素)
词型变化：
形容词:nitrogenous简写符号:N英语解释：
名词 nitrogen:
a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues同义词：N, atomic number 7