形容词
中文翻译：非常低的频率
同义词：
['extremely low frequency', 'extremely low power']
例句：
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1. The radio waves are very low frequencysignals.
无线电波是低频信号。
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2. The deviceoperates at a very low frequency.
该设备以非常低的频率运行。
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3. Thismethod is used to measurevery low frequency signals.
这种方法用于测量非常低频的信号。