"Maybe the reason why free radicals and aging are correlated is because free radical production in the mitochondria (part of the cell) is a stress reaction to the damage of aging," Hekimi said.

海克米说：“人们之所以把自由基和衰老联系在一起，可能是因为自由基在线粒体(细胞的一部分)中产生是人体对衰老的应激反应。”

youdao

Mainly refers to the aging of skin protein synthesis control of gene fragments on the gene mutation, resulting in cell Death and fiber breakage, thus forming.

皮肤的衰老主要指控制蛋白质合成的基因片段上的基因突变，造成细胞的死亡及纤维的断裂，从而形成皱纹。

youdao

But a balance must be struck: If the checkpoint mechanism slows cell division to a trickle, the resulting shortage of new cells will accelerate tissue aging.

但是平衡也受到巨大影响：如果监测点机制使细胞分裂减慢到如同细水长流，后者所引起的新细胞的短缺则可能会加速组织衰老。

youdao

"Actually,each fat cell secretes at least 100 chemicals out of the cell into our bodies, which promote cancer, which promote aging, which promote inflammatory chemicals that can influence dementia, arthritis and heart disease.

VOA: standard.2010.02.23

An aging stem cell doesn't quite have the luxury of dividing into all these cell lines.

CNN: Dr. Sanjay Gupta: Understanding stem cell research

Today the agency proposed a new requirement that, if finalized, will require warnings on the use of ultraviolet light-emitting tanning beds by individuals under age 18 because of the increased risk of melanoma, squamous cell carcinoma, eye damage, and premature skin aging.

FORBES: If Tanning Beds Were A Drug, They'd Be Illegal