For example, you have just repeated your first page for the first time; therefore, the next repetition should follow after four days (for repetition equal to 1 the Interval equals 4 days).

比如，你刚完成了第一页内容的第一次的学习，那么下一次的重复学习应该是4天以后(重复学习次数等于1的间隔是4天)。

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So, the modulation of irregular pulse repetition interval may be employed in FCP that the randomization of signal modulation would be obtained in both time and frequency domains.

因此，若将重复周期参差调制方式融合到频率编码信号中，可使信号具备时-频调制双重随机性。

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