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- Four main factors from the factor load matrix were defined , namely the carbon nitrogen factor, chlorine factor, combustion factor and the factor of Nitr/ Nic. 由化学成分的因子载荷矩阵得到4个主因子，即碳氮因子、氯因子、燃烧性因子和氮碱比因子。
- Helium nitrogen oxygen saturation diving 氦氮氧饱和潜水
- There are nitrogen,oxygen,a little carbon dioxide and water vapour. 它们分别是氮气，氧气，少量的二氧化碳和水蒸汽。
- Plants can absorb carbon dioxide and release oxygen. 植物可以吸收二氧化碳释放氧气。
- Hydrogen, oxygen, nitrogen and carbon are all important to life on Earth. 氢、氧、氮、碳都对地球上的生物十分重要。
- Air consists chiefly of nitrogen. 空气主要由氮气组成。
- A colorless, odorless, tasteless, gaseous mixture, mainly nitrogen(approximately 78 percent) and oxygen(approximately 21 percent) with lesser amounts of argon, carbon dioxide, hydrogen, neon, helium, and other gases. 空气一种无色、无嗅、无味的气体混合物，主要由氮气(约占78％)和氧气(约占21％)组成，还有少量的氩、二氧化碳、氢、氖、氦及其它气体。
- Unlike oxygen, the element nitrogen is inactive. 与氧不同，元素氮不活泼。
- Carbon dioxide consists of carbon and oxygen. 二氧化碳是由碳和氧组成的。
- Nitrogen forms most of the Earth's air. 地球上空气的大部分成分是氮气。
- The lamp is full of gaseous nitrogen. 灯里充满了气体氮。
- I make a carbon copy of my documents. 我用复写纸复写文件。
- Soft drinks contain carbon dioxide. 软饮料中含有二氧化碳。
- Carbon dioxide is converted into oxygen through the agency of plants. 二氧化碳由於植物的作用转化为氧气。
- Nitrogen forms about 78% of the earth's atmosphere. 氮约占地球大气的百分之七十八。
- I have some carbon paper somewhere or other. 我记得我在什么地方放有复写纸。
- Carbon dioxide consists of carbon and oxygen. 二氧化碳是由碳和氧组成的。
- If it were not for oxygen and nitrogen in the air, no man could live on the earth. 大气中如果没有氧和氮，人就无法生存于地球了。
- She's a carbon copy of her sister. 她跟她姐姐一模一样。
- One atom of oxygen is linked to the nitrogen atom by a double bond. 一个氧原子以双键与氮原子相连。
