nitrogen
n. 氮 [化] 氮N-2
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词形变化
别名
教材释义与例句
氮
释义与例句
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1.
The chemical element with an atomic number of 7 and atomic weight of 14.0067. It is a colorless and odorless gas.
氮
氮气
窒素
不可数 可数Holonyms: dinitrogen, N₂, nitrogen (loose sense)
By molar fraction, nitric oxide contains equal parts nitrogen and oxygen.
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2.
Molecular nitrogen (diatomic nitrogen), N₂, a colorless, odorless gas at room temperature, which constitutes most of air (78% of it).
不可数 可数Meronyms: nitrogen (strict sense), N
The air you breathe is mostly nitrogen.
The truck was carrying tanks of nitrogen, so there was no fire risk. Police stated that if the truck had been carrying tanks of oxygen, as it often does, there might have been an explosion.
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3.
A specific nitrogen atom within a chemical formula, or a specific isotope of nitrogen.
可数 不可数The two nitrogens are located next to one another on the ring.
词汇关系
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词源
Borrowed from French nitrogène (coined by French chemist and physician Jean-Antoine Chaptal in 1790). By surface analysis, nitro- + -gen. See also niter.
来源：wiktionary