deterioration
特殊用法autolytic deterioration1.■自然败坏, 自溶变质climatic deterioration1.■气候恶化color deterioration1.■褪色, 变色enzymatic deterioration1.■酶性败坏image deterioration1.■图象变坏[退化]intellectual deterioration1.■智力衰退natural environment deterioration1.■自然环境恶化observable deterioration1.■外观可见的变质, 显著变质oil deterioration1.■油品变质; 油的老化; 油品质量恶化oxidative deterioration1.■氧化变质positive ion deterioration1.■正整流器, 汞池阴极整流器