self aging

例句：

1. 1. The elderly often experience self-aging due to the natural process of aging.
   老年人往往因为自然老化过程而经历自我老化。
2. 2. The research suggests that self-aging is a significant factor in the decline of human longevity.
   研究表明，自我老化是人类寿命下降的一个重要因素。
3. 3.As we age, our skin naturally begins to show signs of self-aging, which can be frustrating.
   随着年龄的增长，我们的皮肤自然会开始显示出自我老化的迹象，这可能会令人沮丧。