名词
中文翻译：副载波
同义词：
['sideward', 'sideband signal']
例句：
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1. The radio station broadcasts a variety of programs on both AM and FM frequencies.
该广播电台在AM和FM频率上广播多种节目。
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2. The engineer used a sideband filter to enhance the quality of the audio signal.
工程师使用了一个边带滤波器来提高音频信号的质量。
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3. In digital communication, sideband modulation is commonly used for data transmission.
在数字通信中，边带调制常被用于数据传输。