名词
中文翻译：自然磨损
同义词：
['natural wear', 'natural decay', 'natural deterioration']
例句：
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1.The leather shoes have naturally worn out over the years.
这些皮靴多年来已经自然磨损了。
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2. The old wooden chair has naturally decayed due to age.
这把旧木椅由于年久失修而自然腐朽了。
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3. The painting has naturally deteriorated over time.
这幅画随着时间的推移自然退化了。