名词
中文翻译：外源周期
同义词：
['external cycle', 'exogenous rhythm例句：1. The research on the exogenous cycle of the disease has been ongoing for several years.（该疾病外源周期的研究已经持续了数年。）']
例句：
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1. The research on the exogenous cycle of the disease has been ongoing for several years.
该疾病外源周期的研究已经持续了数年。
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2. The study of the exogenous cycle is crucial for understanding the disease's progression.
研究外源周期对于理解疾病的进展至关重要。
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3. The researchers found that the exogenous cycle of the virus had a significant impact on the spread of the disease.
研究人员发现，病毒的外源周期对疾病传播产生了显著影响。