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1. The light attenuatoris used to adjust the brightness ofthe display.
光衰减器用于调整显示器的亮度。
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2. The engineer used a lightattenuator to reduce the noise inthe signal.
工程师使用光衰减器来减少信号中的噪声。
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3. The light attenuator was designed to improve the signal-to-noise ratio.
光衰减器被设计用来提高信号与噪声的比率。