汽油中的氮：不会造成污染？
大气中的氮被转变成含氮物质。
The conversion of atmospheric nitrogen into nitrogenous substances.
之后科学家比较了土壤中的氮和磷的含量。
The scientists then compared how much nitrogen and phosphorus were available in the soil.
在流化床燃烧条件下，N2O由煤中的氮转化而来。
N2O is formed by nitrogen in coal under fluidized bed conditions.
农村家庭生活垃圾和人粪尿中的氮均为高于城镇家庭。
钢液在深脱氧的情况下，熔渣中氧化物能较好脱出钢液中的氮；
Under the condition of the liquid steel that is deeply oxidized, the oxides in the molten slag can better denitrogenate from the molten steel.
对板翅换热器中的氮的冷凝和蒸发耦合传热特性进行了实验研究。
An experimental study on conjugated heat transfer performance of evaporation and condensation in plate-fin heat exchanger is carried out.
它长出的叶子可以让农民用来喂牛，其树根中的氮可以增强土壤肥力。
It produces leaves that farmers can feed to cattle, and it has roots that enrich the soil with nitrogen. The trees protect crops from wind and prevent soil erosion.
另一方面，大气中的氮又为包括植物和海洋生物在内的生物过程的所消耗。
On the other side of the ledger, nitrogen is removed from the atmosphere by biological processes involving plants and sea life.
结果表明，采用氩气保护使焊缝金属中的氮含量减少，而对氧含量的影响则不大；
The results indicate that argon shielding can reduce the nitrogen content but not influence that of oxygen in the weld metal.
排放废气中的氮氧化合物已经成为了一个严重的环境问题，日益引起人们的关注。
Nitric oxide covered in the exhaust gas has become a serious problem of environment, which attracts increasing attention.
空气分离方法采用由氮选择性吸附空气中的氮选择性上述之间的氮和氧分离吸附剂。
An air separation method employs the aforesaid nitrogen selective adsorbent for separation between nitrogen and oxygen by selective adsorption of nitrogen in air.
但是空气中的氮气中的氮原子却会被一个叫做同位素的有着不同数量中子的氮原子所替换。
But the nitrogen in the air was replaced with a nitrogen atom with a different number of neutrons, called an isotope.
农田生态系统中的氮循环是影响农业生产力的主要因素之一，同时也会对环境产生影响。
Nitrogen cycling in farmland ecosystem is one of the key factors to affect agricultural productivity and at the same time it affects the environment.
试验显示营养液中的氮和钙、镁、铜、铁、锰等元素在基质上部富集，可产生肥料盐害。
In upper of the medium, the element accumulation of n, Ca, Mg, cu, Fe and Mn may be harmful to the plant.
还探讨了氮肥淋溶过程中的氮形态变化，以及施氮量和土层深度对氮肥淋浴损失的影响。
The leaching process and nitrogen forms, and the effects of application rate and the depth of soils on nitrogen loss by leaching were also discussed in this paper.
农田生态系统中的氮循环是影响农业生产力的主要因素之一，同时也会对环境产生影响。
Modeling nitrogen cycling in studying farmland ecosystem has been an important tool and has been paid much attention.
他们发现，溪流中一氧化二氮的数量与人类活动释放到环境中的氮有关，如使用化肥和污水排放。
They found that the amount of nitrous oxide produced in streams is related to human activities that release nitrogen into the environment, such as fertilizer use and sewage discharges.
在石英玻璃、钠钙玻璃和铅晶质玻璃的表面，发现吸附有来自空气中的氮以及有机沾污物的碳。
Absorption of nitrogen from the air and carbon from contaminating substance has been found on the surface of quartz glass, soda-lime glass and lead crystal glass samples.
主要测试无爆炸性之各种固态或液态之纯质有机化合物中的氮、碳、氢、氧及硫之重量百分率。
A primary use of testing the weight percentages of nitrogen, carbon, hydrogen, oxygen and sulfur within a variety of solid or liquid explosive of pure organic compounds.
经改造后，不仅使产品中的氮含量提高，而且延长了设备的使用寿命，同时也解决了环境污染问题。
After revamp, the nitrogen content in the products is increased, also the service life of the equipment is prolonged, and environmental pollution is eliminated as well.
XPS和AES分析结果表明，月桂胺中的氮与锡表面发生配位作用并在锡表面形成耐蚀性保护膜。
The results of XPS and AES analyses showed that on tinplate surface an anticorrosive coordination compound film of laurylamine was formed, and N atoms in laurylamine molecule were coordinated with Sn.
为遏制水体的富营养化，氮、磷的排放标准日趋严格，生物脱氮除磷工艺能有效地去除水体中的氮、磷。
Nitrogen and Phosphorus are restricted severely to prevent the water eutrophication. Biological nutrient removal (BNR) is an important water pollution control technology.
最常见的例子是有机化合物，亚硝酸盐类的同分异构体，其中一个碳原子以共价键与硝基中的氮原子结合。
The most common examples are organic compounds, isomers of nitrite esters in which a carbon atom is linked by a covalent bond to the nitro group's nitrogen atom.
工业规模采矿、建水坝、砍伐和农业，以及大气中的碳浓度上升和海洋中的氮浓度增高都是明显的地质学标记。
The geological signal will be clear from industrial-scale mining, damming, deforestation and agriculture, as well as the concentration of carbon in the atmosphere and nitrates in the oceans.
发生在自然界中，通过某些土壤中的细菌对大气中的氮的作用，和通过闪电将大气中的氮转化成氮的氧化物。
This occurs naturally by the action of certain soil bacteria on the nitrogen in atmosphere, and the conversion of atmospheric nitrogen to its oxides by lightning.
其中的一些碳最终以烟雾而非二氧化碳的形式排放出来，而那些本该与碳结合的氧分子则转而与空气中的氮结合。
Some of the carbon therefore ends up as soot, rather than carbon dioxide, and oxygen that should be combining with carbon combines with nitrogen from the air instead.
本发明的RING样遍在蛋白E3连接酶参与介导植物中的氮限制适应性应答，且其表达受氮状态的影 响。
The RING-like ubiquitin E3 ligase of the present invention is involved in mediating nitrogen limitation adaptive responses in plants and its expression is influenced by nitrogen status.
在这个过程中，太阳粒子会同地球大气中的氮原子和氧原子撞击并发出光芒，从而制造出类似于微型霓虹灯效果的极光。
In the process, the particles collide with atoms of nitrogen and oxygen in the Earth's atmosphere, which then glow, creating an effect similar to miniature neon signs.
在这个过程中，太阳粒子会同地球大气中的氮原子和氧原子撞击并发出光芒，从而制造出类似于微型霓虹灯效果的极光。
In the process, the particles collide with atoms of nitrogen and oxygen in the Earth's atmosphere, which then glow, creating an effect similar to miniature neon signs.
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