cycle a cycle is one complete reversal of an alternating current or voltage from zero to a positive maximum to zero again and then from zero to a negative maximum to zero again the number of cycles per second is the frequency
周期一个周期是交流电流或电压从零到正最大值再到零的一次完全反转,然后从零到负最大值再到零每秒的周期数就是频率
以上为机器翻译结果,长、整句建议使用 人工翻译 。
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