But other factors also contribute to cell aging.

但其他因素也会导致细胞老化。

These sequences shorten over time in a process that many believe contributes to cell aging.

在许多人认为导致细胞老化的过程中，这些序列会随着时间的推移而缩短。

What we now know about hydras suggests that they could hold the keys to big breakthroughs in research on stem cells, aging, and diseases like Alzheimer’s.

我们现在对九头蛇的了解表明，它们可能是干细胞、衰老和阿尔茨海默氏症等疾病研究取得重大突破的关键。