senilism

例句：

1. 1. As she grewolder, her memory began to fail her.
   随着她年龄的增长，她的记忆力开始衰退。
2. 2.The elderly person was diagnosed with senile dementia.
   这位老人被诊断出患有老年痴呆症。
3. 3. Alzheimer's diseaseis a progressive condition that affectsmemory and thinking.
   阿尔茨海默病是一种逐渐恶化的疾病，影响记忆和思维。