名词
中文翻译：退化
同义词：
['decline', 'decline in health', 'deterioration例句：1. The population has been steadily declining since the 1980s.（自20世纪80年代以来，人口一直在稳步下降。）']
例句：
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1. The population has been steadily declining since the 1980s.
自20世纪80年代以来，人口一直在稳步下降。
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2.The old building is showing signs of deterioration due to neglect.
由于忽视，这座旧建筑正显示出衰败的迹象。
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3. The economy is experiencing a phase of degeneration as the government cuts back on spending.
政府削减开支导致经济进入衰退阶段。