名词
中文翻译：步进衰减器
同义词：
['step-down amplifier', 'step-up amplifier']
例句：
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1. The step attenuatorin the circuit is designed to reduce thesignal's amplitude.
电路中的步进衰减器设计用来降低信号的幅度。
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2. Thestep attenuator was used toadjust the volume of the audio signal.
步进衰减器被用来调整音频信号的音量。
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3. The step attenuator wasresponsible for reducing the noise level in thesignal.
步进衰减器负责降低信号中的噪声水平。