原文视听

Once we had the anatomy and physiology required for speech,
从我们拥有说话必备的生理结构那刻起
we were primed to talk.
就准备好了说话
Enriched their lives enormously.
极大地丰富了他们的生命
I don't know why I said it.
我不知道我为什么要这么说
To create everything that exists up till now.
创造至今存在的一切
But when did we actually start to speak?
但我们究竟是何时开始讲话的呢
The dawn of speech is one of the great puzzles of evolution
语言的黎明是进化史上的巨大谜题之一
because there's no fossil record of verbal communication
因为并没有记录语言交流的化石
for scientists to look back through.
供科学家来回溯过去
Mark Pagel is an evolutionary biologist
马克·帕杰尔是位进化生物学家
on the hunt for the origins of language.
专门寻找语言的起源
There's a lot of ideas about this.
关于语言起源有很多说法
They're all speculation
都是推测
but they rely on having the right genetics in place
但他们都依赖于适当的基因
and having the right anatomy in place,
以及适当的生理结构
and we know that by 200,000 years ago,
我们知道 在二十万年前
both of those things were available.
人类就具备了这种基因和结构

重点解释

because there's no fossil record of verbal communication for scientists to look back through.因为并没有记录语言交流的化石供科学家来回溯过去

look back回顾； 回头看

She looked back over a distance of ten years.

她回顾过去十年的时间。

How do you look back on your time at Liverpool?

你怎样回头看你在利物浦的职业生涯？

Mark Pagel is an evolutionary biologist on the hunt for the origins of language.马克·帕杰尔是位进化生物学家专门寻找语言的起源

on the hunt寻找

The police are on the hunt for further clues.

警方正进一步寻找线索。

The company is on the hunt for a personnel manager.

这个公司在招聘一名人事经理。

but they rely on having the right genetics in place但他们都依赖于适当的基因

rely on 依靠；信赖

Don't rely on him to do anything he's just a talker.

什么事都不要依靠他－－他光会说空话。

Now that you are grown up, you should not rely on your parents.

既然你长大了，就不应该依靠你的父母。