名词
中文翻译：频率
同义词：
['rate', 'frequency', 'rate of', 'quota', 'ratio']
例句：
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1. The radiostation has a high frequency of listeners.
这个电台的听众频率很高。
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2. The newproduct has a low frequency of defects.
新产品缺陷率低。
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3. The frequency of light waves ismeasured in meters per second.
光波的频率以米每秒为单位测量。