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

• The basic nitrogen compounds include pyridines and quinolines.
  碱性氮化物包括吡啶和喹啉。
• ■ Five basic elements: carbon, oxygen, hydrogen, phosphorus and nitrogen.
  ■五种基本元素：碳、氧、氢、磷和氮。
• Nitrogen is of paramount importance to life on earth.
  氮对地球上的生命至关重要。
• The removal rates of ammonia nitrogen, denitrification ability and anammox ability were investigated in three bioreactors.
  探讨了序批式生物反应器填埋场的氨氮去除率、反硝化能力以及厌氧氨氧化能力。
• Life on Earth requires six basic ingredients carbon, hydrogen, nitrogen, oxygen, sulfur and phosphorus.
  地球上的生命体需要六种基本元素碳、氢、氮、氧、硫和磷。
• Sulfur dioxide and nitrogen oxides are the main gas emissions of the smoke and waste gas.
  二氧化硫和氮氧化物是烟气的主要气体排放物。
• Nitrogen fertilizer had significant promoting effect on yield and water use of winter wheat.
  施氮对冬小麦产量和水分利用效率有显著促进作用。
• Carbon atoms can form bonds with nitrogen and oxygen atoms.
  碳原子可以与氮和氧原子形成化学键。
• 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。
• 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%。