nitrogen
nitrogen 英 [ˈnaɪtrədʒən] 美 [ˈnaɪtrədʒən]
n. [化学] 氮
名词复数:nitrogens
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- n. [化学] 氮
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1. nitrogen is one of the byproducts.
氮就是其中的一个副产品。
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2. The plant requires nitrogen in order to make proteins.
植物需要氮以便制造蛋白质。
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3. nitrogen fertilizer
氮肥；氮肥肥料
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4. What is the percentage of nitrogen in air?
空气中所含的氮的比例是多少?
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5. Nitrogen is a gas without colour or smell.
氮是一种无色无臭的气体。
- nitrogen (n.) 1794, from French nitrogène, coined 1790 by French chemist Jean Antoine Chaptal (1756-1832), from Greek nitron "sodium carbonate" (see nitro-) + French gène "producing," from Greek -gen "giving birth to" (see -gen). The gas was identified in part by analysis of nitre. Earlier name (1772) was mephitic air, and Lavoisier called it azote (see azo-).
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