In a solid-fuel rocket the reaction of fuel mixture is relatively slow and steady rather than explosive.

在使用固体燃料的火箭中，燃料混合物的反应比较缓慢而稳定，而不是爆发性的。

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The spark plug fires, igniting the compressed air-fuel mixture which produces a powerful expansion of the vapor.

火花塞点燃压缩的空气燃油混合气，燃烧使混合气迅速膨胀。

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Blowby is basically the leakage of compressed air-fuel mixture and burned gases past the piston rings into the crankase.

窜气，基本上是被压缩的空燃混合气和燃烧后的气体的泄漏，它通过活塞环进入曲轴箱。

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And there was a new fuel, a mixture of liquid ammonia and liquid oxygen.

VOA: special.2010.07.07

The engines increase airflow, creating a more complete burning of the air-fuel mixture--and a more powerful vehicle.

FORBES: Magazine Article

But it turns out that pilots can run the engine better by adding some air and subtracting some gas in the fuel mixture.

FORBES: Institutional Stupidity, III

This is possible because with the lasers, the location of the ignition can be in the center of the air-fuel mixture, rather than just the portion closest to it.

FORBES: Replacing Spark Plugs With Lasers For A More Fuel-Efficient Car