全部

1·The Sahara slowly became drier and lakes vanished.

撒哈拉地区逐渐变得干燥，那里的湖泊也消失了。

2·The Sahara is a sandy desert with great sand hills.

撒哈拉沙漠是一个沙质沙漠，有很多沙丘。

3·Even before the drought, the Sahara was never well watered.

即使在变得干旱之前，撒哈拉沙漠也从未得到充分的灌溉。

4·As I said the monsoon migrated itself, so there was less rain in the Sahara.

就像我说的，季风会自己转移，所以撒哈拉的雨水就少了。

5·Then there is fossilized pollen, from low shrubs and grasses that once grew in the Sahara.

还有一些石化的花粉，来自于曾经生长在撒哈拉的小灌木丛和草丛。

6·Most animals seek shade when temperatures in the Sahara Desert soar to 120 degrees Fahrenheit.

当撒哈拉沙漠的温度飙升到120华氏度时，大多数动物会寻找庇荫处。

7·Several skeletons of another early whale, Basilosaurus, were found in sediments left by the Tethys Sea and now exposed in the Sahara desert.

在特提斯海留下的沉积物中发现了另一种早期鲸鱼龙王鲸的几具骨架，它们现在暴露在撒哈拉沙漠中。

8·Their migration may have been set in motion by an increase in population caused by a movement of peoples fleeing the desiccation, or drying up, of the Sahara.

他们的迁徙可能是人口增加引起的，这一人口增长是由人们逃离撒哈拉沙漠的干燥或干涸的迁移造成的。

9·Rock paintings in the Sahara indicate that horses and chariots were used to traverse the desert and that by 300-200 B.C., there were trade routes across the Sahara.

撒哈拉地区的岩画显示，人们曾利用马匹和马车来横穿沙漠；并且，在公元前300年至公元前200年间，有一些可以穿越撒哈拉地区的贸易路线。

10·Anyway, it's this fossilized pollen along with the aquifers and the rock paintings, these three things are all evidence that the Sahara was once much greener than it is today.

总之，这些花粉化石，还有含水层和岩画，这三样东西都证明了撒哈拉沙漠曾经比现在绿得多。