As part of normal aging, the hippocampus shrinks.

正常衰老的同时，海马体也会收缩。

youdao

You know, when I watch sci-fi movies I notice everyone has a normal aging pattern.

你知道，我看科幻电影时，注意到每个人都有一套正常的变老机制。

youdao

Sleep patterns change as we age, but disturbed sleep and waking up tired every day are not part of normal aging.

睡眠形式会随着年龄改变，但是每天睡不好、醒来感觉很累可不是正常的老化现象。

youdao

The list shows the difference between these signs of normal aging and the possibility of developing Alzheimer's.

VOA: special.2009.09.15

Richard Weindruch explains. "Our data show that there is about a three-fold higher risk of developing a disease of aging in those animals fed the normal diet as opposed to those that have been on caloric restriction since they were adults."

VOA: special.2009.09.01

The fifth, a 64-year-old former quarterback, was described as simply experiencing the memory loss consistent with normal aging.

FORBES: CTE in Brain Scans of Five Retired NFL Players - Now What?

Rapamycin also is being studied for its impact on the normal aging process.

WSJ: Progeria Drug Study Helps in Search for Clues on Aging

Francis Collins, director of the National Institutes of Health and one of the discoverers of the gene that causes progeria, said the drug's usefulness for vascular stiffness in normal aging is an important question to study.

WSJ: Progeria Drug Study Helps in Search for Clues on Aging