名词
中文翻译：窄带频道
同义词：
['narrowband', 'narrow-band', 'narrowband channel']
例句：
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1. Thisnew TV channel is specifically designed for the elderly.
这个新的电视频道是专门为老年人设计的。
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2. The government has been using this narrow-band channel to communicate with the people in the remote areas.
政府一直在使用这个窄带频道与偏远地区的人民进行沟通。
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3. The narrow-band channel was used to transmit signals over long distances without interference.
窄带频道被用来在远距离传输信号，而不受干扰。