名词短语
中文翻译：阶梯老化
同义词：
['progressive aging', 'age-related diseases', 'aging process']
例句：
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1. The study found that theelderly population is experiencing stepped aging.
研究发现，老年人群体正在经历阶梯老化。
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2. Aging isa natural process that occurs as we getolder.
衰老是一个自然过程，随着年龄的增长而发生。
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3. The researchersbelieve that the steps inthe aging process can be slowed down through lifestyle changes.
研究人员认为，通过改变生活方式可以减缓衰老过程的步骤。