名词
中文翻译：衰老
同义词：
['senescence', 'senileness']
例句：
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1. Ashe grew older, his memory began tofail him.
随着他年龄的增长，他的记忆力开始衰退。
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2. The elderly person was diagnosedwith senile dementia.
这位老人被诊断出患有老年痴呆症。
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3.Senility is a natural part of theaging process.
衰老是自然老化过程的一部分。