You make not only water vapor, but you make some nitrous oxides, NOX, or nox as it is known, and this is the precursor to smog.

你不仅仅制造水蒸气，你还会制造一些氮氧化物，NOX，或者如大家所知到的 nox，而这是烟雾的前驱体。

More than half of U.S. coal generators lack postcombustion NOx pollution controls.

超过一半的美国煤炭发电机缺乏二次燃烧氮氧化物污染控制。

Different combustion form influence the NOx emission.

对比不同构型对氮氧化物生成的影响。

Germany is typical in Europe in controlling NOx emission.

欧洲控制氮氧化物的排放以德国较为典型。

The NOx emission is high along with the great of primary air rate.

一次风率越大，氮氧化物排放量越大。