The catalytic converter on your exhaust system contains cerium and lanthanum.

排气系统上的接触反应器含有铈和镧。

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Catalytic converters provide the method of treating exhaust gases. Catalytic converters are located in the exhaust system, between the engine and the muffler.

催化转换器提供一种处理废气的方法。催化转换器位于排气系统中，在发动机和消声器之间。

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Coat the exhaust system with ceramic without the catalytic converter OR let it rust out and replace the whole dang thang with stainless steel pipe sections.

大衣与不带催化转化器或陶瓷让它锈出来更换整个党的不锈钢管段胜排气系统。

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In Europe the trucking industry has settled on a technology called selective catalytic reduction, in which urea is periodically injected into the exhaust system to break down the NOx, converting nitrogen oxides into (somewhat) harmless ammonia.

FORBES: Clearing the Air