名词
中文翻译：窄幅记录器
同义词：
['narrow-band recorder', 'narrow-spectrum recorder']
例句：
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1. The narrow-spectrum recorder was used to capture the audio signals from a specific frequency range.
窄频记录器用于捕捉特定频率范围内的音频信号。
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2. The narrow-spectrum recorder was used to analyze the chemical composition of the sample.
窄频记录器被用来分析样本的化学成分。
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3. The narrow-spectrum recorder was used to monitor the environmental conditions in the area.
窄频记录器被用来监测该地区的环境条件。