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Thee quality or state of being periodic; recurrence at regular intervals.
周期性周期出现的性质或状态； ；以固定的间隔而发生。
youdao
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The quality or state of being periodic; recurrence at regular intervals.
周期性周期出现的性质或状态；
youdao
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The quality or state of being periodic; recurrence at regular intervals.
周期性周期出现的性质或状态；
youdao