In the spark - ignition engine, recirculating some of the exhaust gas reduces the emission of nitrogen oxides.

在火花点火的发动机中, 再循环的一部分废气减少了氧化氮的有害污染物.

辞典例句

Carburetor: Device for supplying a spark ignition engine with a mixture of fuel and air.

化油器: 向火花点火式发动机供给燃油和空气混合气的装置.

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