We measure the bareengine noise, then rank which particular areas of the engine are producing the highest levels of noise.
我们衡量裸发动机噪音，然后排名特定地区的发动机生产最高水平的噪音。
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This is a beautifully restored aircraft, and it must take many hours of hard work to keep the bare aluminum this shiny - you can even see the engine and the airshow grounds reflected on the fuselage!