名词
中文翻译：周期性的
同义词：
['cyclical', 'rhythmic']
例句：
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1.The periodic changes in the weather patterns are fascinating.
天气模式的周期性变化令人着迷。
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2. The researcher found that the periodic changes in the population were due to natural causes.
研究人员发现人口的周期性变化是由于自然原因导致的。
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3. The periodic changes in the economy have a significant impact on the overall stability of the country.
经济周期的变化对国家的整体稳定有显著影响。