Although the proportion of new cars in Donia's capital city has always been comparatively high, nitrogen dioxide emissions there have shown only an insignificant decline since 1993.

尽管在 Donia 的首都城市，新车的比例一直相对较高，那里的二氧化氮排放量自1993年以来仅略有下降。

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As a kind of new engineering material, high Nitrogen stainless steel plays more and more important role in industrial production.

作为一种新型工程材料，高氮不锈钢在工业生产中发挥着越来越重要的作用。

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This method owns advantages of saving energy, high efficiency, high nitrogen content, steady chemical composition, lower impurity, powerful capacity and lower cost.

此方法具有节能高效、产品含氮高、化学成分稳定、杂质含量低、生产能力大、成本低等优点。

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Then in the early 20th Century, German chemist Fritz Haber invented a high temperature-high pressure technique to convert atmospheric nitrogen into ammonia.

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The process that smokestack "scrubbers" use to reduce nitrogen oxide and sulfur dioxide emissions creates high-quality synthetic gypsum, said Robert E.

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