gerontics

例句：

1. 1. Gerontology is the study of aging and its effects on health.
   老年学是研究衰老及其对健康影响的研究。
2. 2.The research in gerontology has led to many new treatments for age-related diseases.
   老年学的研究已经导致了许多新的针对与年龄相关的疾病的治疗。
3. 3.Gerontologists are experts who study the effects of aging on human health.
   老年学家是研究老化对人类健康影响的专家。