劣化， れっか

1. deterioration (in quality, performance, etc.), degradation, worsening 2. (visible) aging, becoming unattractive (due to aging)

劣化，恶化；老化

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音读: レツ  

训读:おと.る  

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音读: カ   ケ  

训读:け.する  ば.ける  ふ.ける  ば.かす  

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