the number of beats = the difference between the two frequencies 求翻译

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the number of beats = the difference between the two frequencies 求翻译
the number of beats = the difference between the two frequencies 求翻译

the number of beats = the difference between the two frequencies 求翻译
字面意思就是 打击的次数等于这两种频率的区别 不晓得你这个上下文是什么 所以没有办法解释