名词中文翻译
中文翻译：频率参考
同义词：
['reference frequency', 'reference level']
例句：
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1.The device's frequency reference is accurate to within a few parts per million.
该设备的频标准确度在百万分之几以内。
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2. The engineer used the frequency reference to tune the radio.
工程师使用频率参考来调校收音机。
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3. In order to ensure accuracy, the frequency reference must be checked regularly.
为了确保准确性，必须定期检查频率参考。