1、The decadency of the Roman Empire is often attributed to political corruption and moral decay.（罗马帝国的衰落常被归咎于政治腐败和道德堕落。）
2、His extravagant lifestyle and indulgence in vices were clear signs of his decadency.（他奢华的生活方式和沉溺于恶习的行为明显显示出他的颓废。）