High concentration of sulphur dioxide, nitrogen, oxides and dust have long been known to be harmful.

Nitrogen is a gas without colour or smell.

氮是一种无色无臭的气体.

The plant requires nitrogen in order to make proteins.

植物需要氮以便制造蛋白质.

The mechanism of the high nitrogen stainless steel showing excellent properties also analyzed and discussed.

本文还对高氮不锈钢表现出的优异性能的机制进行了分析和讨论.

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.

Second, nitrogen dioxide emissions question.

二是二氧化氮的排放问题.

NAAQSs for carbon monoxide, particulates, sulfur dioxide, nitrogen dioxide, hydrocarbons, ozone, and lead.

联邦环境保护局长已经制定了《全国环境空气质量标准》,具体制定了诸如一氧化碳 、 粒 、 氧化硫、氧化氮 、 氢化合物 、 氧和铅的含量标准.

The wrapper method commonly used gas is nitrogen, dioxide and ammonia.

该包装法常用的气体是氮气 、 二氧化碳和氨气.

Mycorhizae perform the function of nitrogen fixation and storage.

菌根起着固氮和贮氮的作用.

Patterns of nitrogen fixation along 10 N in the tropical Atlantic.

沿热带大西洋10N氮气固定作用的图形.

Nitrogen fixation trees of Leguminosae and non-Leguminosae are important biological nitrogen fixation resources.

摘要豆科及 非 豆科固氮树种是重要的生物固N资源.

Fighting nitrogen oxide on the streets is the latest twist.

在香港,水泥板上涂了二氧化钛,可以去除90%的氮氧化物.

The main pollutants of coal-firing boilers include dust, sulfur oxide , nitrogen oxide and carbon dioxide.

燃煤 锅炉的主要污染物包括粉尘 、 硫氧化物 、 氮氧化物和二氧化碳.

The discharge amount of nitrogen oxide can reduce 30 %.

氮的氧化物排放量减少30%.

Reduced nicotinamide nucleotides can function as reductants to nitrogenase.

还原的烟酰胺核苷酸对固态酶可以起还原剂的作用.

Soil drought reduced moisture content and nitrogenase activity of nodules.

土壤干旱降低田菁根瘤的含水量和固氮活性.

Such formation of nitrogenous compounds promotes protein synthesis that is essential for plant growth.

这种转变促进植物合成蛋白质,以利生长.

Therefore, sufficient nitrogenous fertilizer is an essential way to prevent early senescence period of wheat growth.

因此, 保证小麦生长中后期充足的氮素供应,防止早衰是提高籽粒产量的重要途径.

This paper introduces the feature of bellows heat exchanger and its application in nitrogenous fertilizer enterprises.

介绍了波纹管换热器的特性及在氮肥企业中的应用.

Introduces the process and principle of 4 M 8 nitrogenous press electric control and instrument system.

介绍4M8氮压机电气控制过程和原理及仪表系统.

The Model L compressor is the most popular machine in the small nitrogenous fertilizer plant.

型压缩机是小氮肥行业使用最为普遍的机种.