The above line will give you a sorted frequency distribution of your field names, similar to the following.

上面的代码行将为您提供字段名的排序后的频率分布，类似以下清单所示。

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Additionally, Dragon Runner SUGV, gives operators field-changeable frequency capabilities, using analogue or digital radio options.

此外，通过模拟或数字无线电选项，“龙信使”可以为操作人员在野外环境提供可变频通信能力。

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This notion of inter-domain transformation is useful in many fields of study-for example, moving from the time domain into the frequency domain in the field of signal processing.

这种域间转换的概念在很多领域的学习中都很有用—例如，信号处理领域中从时间域移入频率域。

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Although they have not been found to cause any harm, the cables on conventional pylons, which transmit a three-phase alternating current, generate a strong electric field and a continuous buzz of low-frequency radio waves.

ECONOMIST: Monitor