... millions of years ago 几百万年以前 ; 数百万年前 two thousand years ago 两千年前 scores years ago 许多年前 ...
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Paper was first invented about two thousand years ago in China by Cai Lun.
大约两千年前,中国的蔡伦首次发明了纸。
Qu-yuan was born around two thousand years ago in China.
屈原大约出生在两千年前的中国。
The Great Wall built over two thousand years ago is of historical importance.
建于两千多年前的长城具有重要的历史研究价值。
Two thousand years ago, the Greek doctor Hippocrates advised his patients to chew on the bark and leaves of the willow.
VOA: special.2010.12.14
Historians believe the Maya people of Central America first learned to farm cacao plants around two thousand years ago.
VOA: special.2010.02.17
This area includes rock art made by people who lived there more than two thousand years ago.
VOA: special.2009.04.15
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