这些反应增加了不完全燃烧的可能性，更有可能释放未燃尽和光化学活性碳氢化合物到大气中。
These reactions increase the probability of incomplete combustion and are more likely to release uncombusted and photochemically active hydrocarbon compounds into the atmosphere.
在新公布的设计方案中，建筑物与西街的距离由25英尺(7.6米)增加到平均90英尺(28米)。
Under the new plans, the distance from West Street has been increased from 25 feet (7.6 metres) to an average of 90 feet (28 metres).
火花塞只点燃火花隙附近的燃料混合物，这就降低了燃烧效率，并且随着使用年限增加火花塞中的金属慢慢被侵蚀。
Spark plugs only ignite the fuel mixture near the spark gap, reducing the combustion efficiency, and the metal that makes them up is slowly eroded as they age.
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