But the patterns of methylation change as we grow older. Which was a clue that measuring methylation might give away age.

但是甲基化的发生模式会随着我们年龄的增加发生变化，这也就为通过测定甲基化确定人体年龄提供了可能。

youdao

We felt we should repeat studies that we had done in 1991, which showed no change in the age of puberty, to see if we were now experiencing this phenomenon.

我们感到有必要继续我们在1991年就已经做过的研究。 尽管那时候的研究显示欧洲儿童的青春期年龄没有变化，但现在不知道我们这是不是也有肥胖的问题。

youdao

It is, I think, a masterpiece of Ice Age art, and it's also evidence of a huge change in the way in which the human brain was working.

我认为这是一件冰河时代的艺术杰作，同时它也是人类运转方式产生巨大变化的鲜明证据。

youdao

However it is still not yet clear whether is he is allowed now to play for Mali under new FIFA regulations, which allow players to change national allegiances but with certain restrictions on age, dual nationality and the level of past international appearances.

BBC: SPORT | Football | African | Mali confident on Kanoute

Traditional seniority systems, under which people get promoted and paid more as they age, therefore need to change.

ECONOMIST: Pensions: 70 or bust! | The

But the change in uprating for the next few years is a reform which asks most working age households to contribute, regardless of circumstance.

BBC: Fairness and the welfare bill