如今撒哈拉大沙漠的干涸迫使许多人迁移到撒哈拉以南的非洲。

The drying up of what is now the Sahara desert had pushed many peoples to the south into sub-Sahara Africa.

youdao

据估计，非洲的撒哈拉大沙漠正以每月0.5英里的速度扩展。

By some estimates, the Sahara desert in Africa is growing at a rate of 0.5 miles per month.

youdao

在第二个试验中，志愿者带着水和食物留在了撒哈拉大沙漠几个小时。

In a second experiment, volunteers were left in the Sahara for several hours with water and food.

youdao