名词
中文翻译：频率
同义词：
['rate', 'quantity', 'number', 'degree']
例句：
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1.The frequency of the light changes with the time of day.
光的频率随着一天中的时间而变化。
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2. The frequency of the waves is related to their wavelength.
波的频率与波长有关。
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3.The frequency of the sound can be measured by a meter.
声音的频率可以通过仪表测量。