Thousands of years ago, Britain was covered by thick forests, home to many animals which no longer live in the United Kingdom.

几千年前，英国被茂密的森林覆盖着，是许多动物的家园，这些动物已经不在英国生活了。

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But the Empty Quarter lakes disappeared thousands of years ago.

但是位于鲁卜哈利的湖在数千年前就已消失殆尽。

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Amazingly, what really indicates how undesert-like the Sahara was thousands of years ago, was something painted on the rock.

令人惊奇的是，真正表现出几千年前的撒哈拉有多么不像沙漠的，是岩石上所画的一些东西。

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In two-thousand three, American William Ruddiman first proposed that global warming resulted from human activities thousands of years ago.

VOA: special.2011.04.26

And the history of human rights ; for some people's gonna start thousands of years ago; And for many people was going to start in the Enlightenment.

人权的历史,对一些人来说几千年前就开始了;,而对很多人而言则是在启蒙运动时发端。

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In fact, there's evidence that even thousands of years ago, Indian and Chinese healers were using a form of something that we would recognize as vaccination.

事实上,有证据表明在几千年前,印度和中国的医生就在使用一种,类似于疫苗的东西

耶鲁公开课 - 生物医学工程探索课程节选

Thousands of years ago humans didn't live long enough to die of clogged arteries.

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You can imagine what it was like for them that many thousands of years ago.

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Cameroonian chimps got the virus probably many thousands of years ago by killing and eating monkeys.

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