名词
中文翻译：键控放大器
同义词：
['key-operated amplifier', 'key-controlled amplifier']
例句：
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1. The keyed amplifier in the lab is capable of amplifying signals with high fidelity.
实验室里的键控放大器能够以高保真度放大信号。
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2. The engineer used a keyed amplifier to boost the volume of the audio signal.
工程师使用了一个键控放大器来提高音频信号的音量。
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3.The keyed amplifier was designed to be easily integrated into existing systems.
这个键控放大器被设计成可以很容易地集成到现有的系统中。