degeneration [dɪˌdʒenəˈreɪʃn]

例句:

• These late-onset forms are often called age-related macular degeneration.
  来自SA
• Over-use of those drugs, coupled with poor diet, leads to physical degeneration.
  过量使用那些药物再加上饮食缺乏营养，导致健康状况恶化。
  
• Intensive farming in the area has caused severe degeneration of the land.
  这个地区的集约化农业使得土壤严重贫瘠化。
  
• This is a late change in the degeneration of cells.
  这是细胞衰退的晚期变化.
  
• Without integrity or completeness, there is degeneration.
  来自SA
• A tragic breakdown of...standards, and the midnight of moral degeneration deepens.
  来自M. L. King