service frequency的用法和樣例：
例句
- The voltages set up are of normal operating frequency.
由此引起的過電壓頻率通常為正常的工作頻率。 - Moreover, the numerical simulation indicates the mean gas temperature has more influence on the working frequency than the mean gas pressure and the length of regenerator.
數值模擬結果顯示，發動機內氣體平均溫度較平均壓力和回熱器長度對工作頻率的影響更大。
