retrograde degeneratiaon逆行性变性

climatic degeneratiaon气候恶化

tissue degeneratiaon组织变性

noise degeneratiaon噪声衰减

temperature degeneratiaon温度减退

cystis degeneratiaon变性囊肿

graceful degeneratiaon性能下降

abiotic degeneratiaon非生物性败坏;非生物性退化

microbiological degeneratiaon微生物退化

cellular degeneratiaon细胞衰退