名词
中文翻译：退化
同义词：
['decay', 'deterioration', 'decay']
例句：
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1.The process of natural degeneration is a slow and gradual one.
自然退化的过程是缓慢而渐进的。
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2. The old man's health was in a state of degeneration due to his age.
由于年老，老人的健康处于退化状态。
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3.The study of the history of degeneration has shed light on the causes of many diseases.
对退化历史的研究揭示了许多疾病的成因。