纪录片《长生不老》 03衰老的成因

（单词翻译）

Understanding why we age has been a major scientific mystery.

弄明白我们衰老的原因成了一个科学之谜

I think all of us kind of know what ageing is all about

我想我们都知道什么是衰老

because we've either experienced it, I mean even if we're young,

因为我们都经历过 即便我们还年轻

we've seen our parents, our grandparents age,

我们目睹我们的父母 祖父母变老

but understanding the mechanism¹,

只知道这是不可避免的

this would be the mystery of the mysteries.

这就成为了谜中迷

It's a very young field and that's probably the reason why

这是一块未成熟的领域 那可能是

we don't know much about

我们不了解它

it and why there are so many competing models,

所以才有五花八门的观点

and I think the real key is probably in understanding

我认为真正关键在于搞懂

how these different pathways relate to each other.

这些不同观点是怎样相互联系的

If you were a Martian coming to this planet, and you saw someone

假如你是火星人来到这个星球 你看到

in her '90s and her granddaughter of sixteen,

90多岁的人和她的16岁孙女

then you would say "Gee², there's not much difference."

你会说 咦 没什么区别啊

On the other hand, if all of a sudden the house caught on fire

另一方面 如果突然房子着火了

and the people ran, you would immediately be able to say,

人们跑了出来 你会立刻说

"Oh, this one really didn't make it very far."

噢 这人跑不远

We don't really have a

我们真的不知道

clue for exactly what's happening in ageing.

在衰老时到底发生了什么