名词
中文翻译：调谐放大器
同义词：
['tuned oscillator', 'tuned circuit', 'tuned receiver']
例句：
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1. Theengineer tuned the amplifier to the correct frequency.
工程师调整了放大器到正确的频率。
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2.The audio equipment in the recording studio is tuned to perfection.
录音棚里的音频设备调校得完美无缺。
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3.The radio was tuned to the local news station for the best reception.
收音机被调至当地新闻台以获得最佳接收效果。