所以，你在市场噪声信号系统，如果有一些人低质量的产品谁也降低了成本。

So, you get noise in a market signaling system if there are some people with lower quality products who also have lower cost.

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有几种办法可以尽量降低测试系统中电离干扰引起的噪声。

There are several ways to minimize noise in the test system due to ionization interference.

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排气系统可以降低从发动机气缸排出的已燃废弃的噪声，并且安全地将这些废气带走使其远离汽车内的人。

The exhaust system reduces the noise of the burned gases leaving the engine cylinders and carries these exhaust gases safely away from the people in the car.

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