名词
中文翻译：频率标准
同义词：
['frequency measure', 'frequency measurement']
例句：
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1. The radio wave is a frequency standard for measuring distances.
无线电波是测量距离的频率标准。
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2. The new device uses a frequency standard to ensure accurate measurements.
新设备使用频率标准以确保准确的测量。
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3.The frequency standard was used to calibrate the clock.
频率标准被用来校准时钟。