In theory, at least, it would be best to select the highest possible frequency, but in practice, the highest frequencies can guzzle up processor power.

从理论上讲，至少，这将是最好的选择尽可能高的频率，但在实践中，最高频率可以狂饮了处理器的功耗。

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The trick is to generate the highest frequency possible but keep the average duty cycle constant.

关键是产生最高频率的可能性，还能保持平均的占空比常数。

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