nitrogen

英 [ˈnaɪtrədʒən]

美 [ˈnaɪtrədʒən]

n.  氮; 氮气

复数：nitrogens　

CET4CET6考研TOEFLIELTSTEM4TEM8化学

Collins.1 / BNC.6287 / COCA.5881

牛津词典

noun

• 氮；氮气
  a chemical element. Nitrogen is a gas that is found in large quantities in the earth's atmosphere.

柯林斯词典

• 氮;氮气
  Nitrogenis a colourless element that has no smell and is usually found as a gas. It forms about 78% of the earth's atmosphere, and is found in all living things.

英英释义

noun

• a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas
  Synonym:Natomic number 7

双语例句

• Sulphur Oxides and Nitrogen Oxides are two major emissions released in the flue gas of coal-fired power plants.
  硫氧化物和氮氧化物是燃煤电厂烟气中两种主要的污染物。
• Effects of borax on digestibility of nutrients and nitrogen metabolism in sheep were investigated.
  本文研究了硼砂对绵羊营养物质消化率及氮代谢的影响。
• The concentration of nitrogen dioxide in Beijing's air was reduced by an average of 20 per cent.
  北京空气中二氧化氮的含量平均降低了20%。
• The consumption of the carbon, nitrogen and phosphate acid closely correlated with the crocin synthesis.
  碳源、源和磷酸的消耗与藏红花素的合成密切相关。
• The plant requires nitrogen in order to make proteins.
  植物需要氮以便制造蛋白质。
• Oxygen, hydrogen and nitrogen are all gases.
  氧气、氢气和氮气都是气体。
• They are mostly sulfur dioxide and nitrogen dioxide from power plants, auto exhausts and industry.
  这些颗粒大部分是发电站、汽车尾气和工厂排出的二氧化硫和二氧化氮。
• Among the common toxic gases are sulfur dioxide, methane, the oxides of nitrogen, ammonia, hydrogen sulfide, and hydrogen cyanide; and ( most commonly) carbon monoxide.
  常见的有毒气体有二氧化硫、甲烷、氧化氮、氨、硫化氢、氰化氢以及最常见的一氧化碳。
• Carbon source, nitrogen source and plant hormone had the obvious effects on the callus growth and flavonoids production.
  碳源、氮源、植物激素对愈伤组织生长和黄酮类形成影响较为显著。
• The pyrolysis characteristics of polytetrafluoroethylene ( PTFE) were studied in the atmosphere of nitrogen by thermogravimetric analysis.
  采用热重分析法，研究了聚四氟乙烯（PTFE）在氮气气氛下的热裂解特性。