They say this is what causes aging.

他们指出，这是导致衰老的原因。

But these are not analogous to what happens when man ages.

不过，这些衰老的情况同人并不相似。

Some of us have brains that age more slowly.

有些人大脑衰老的速度会慢一些。

Dogs and humans aging much the same way.

狗和人类衰老的过程十分相似。

Think about that next time you feel like you're aging too fast.

下次你担心自己加速衰老的时这个吧。

A) ;;Why people age at different rates.

A）；；人们衰老的速度不同。

And some scientists think that it's an important factor in aging.

一些科学家认这是衰老的一个重要因素。

Many, many people feel that they are a sign of aging.

很多很多人都觉得助听器是衰老的标志。

Previous research had demonstrated too that DCA damages DNA in a way that promotes senescence.

先前的研究也发现，DCA会以一种诱发衰老的方式破坏DNA。

And you can find hundreds of products these days that claim to have anti-aging properties.

你会发现现在有很多产品声称具有抗衰老的效果。

That's not only the consolation of age, that's the promise of wisdom.

这不仅是对于衰老的安慰，也是智慧的承诺。

Scientists have found this gene to be the main cause of aging in cells.

科学家发现这个基因是导致细胞衰老的主要原因。

Aging worms are not aging humans.

衰老的蛔虫并不能和老去的人类划上等号。

However, this is the first to show how the ribosomes can influence aging.

然而，该研究首次解释出核糖体是如何延缓衰老的。

50. What do we learn from the last paragraph about the process of aging?

50.关于衰老的过程，我们从最后一段中学到了？

But research on dementia suggests it is not a normal part of aging.

但对痴呆症的研究表明，这并不是衰老的正常部分表现。

Shortening with each cell division, they help determine how fast a cell ages.

随着细胞分裂的缩短，它们有助于确定细胞衰老的速度。

Dread of aging might be a consequence of a parent's rivalrous jealousy.

对衰老的恐惧可能是他们父母的争强好胜式的嫉妒所致。

Dementia is not a normal part of aging, but age is a huge risk factor.

痴呆并不是衰老的一个正常部分，但年龄却是一个巨大的危险因素。

If something is advertised as being anti-agingit means it's designed to stop you looking older.

如果某物被宣传具有抗衰老的效果，那它的制作意图是阻止你变老。