Hints： Arabian Asia Northern Africa Tuareg West Africa the Mediterranean caravan The Sahara European Chad lower-lying Savanna rockhyraxes acacia 本文2個(gè)破折號(hào) 呼~(yú) 地名好多。。 認(rèn)真聽(tīng)寫(xiě)哦~~

The Arabian camel--not even a native , was domesticated in the deserts of Asia and brought to Northern Africa as a means of transport. In the past , Tuareg nomads used camels to move slaves, gold and ivory between West Africa and the Mediterranean. Today their caravans still trade in salts, dates and millet.
The Sahara has long been a frontier between Asia and Africa. But there are European pioneers here too--red foxes, which scrape a living on the Northern fringes of this vast desert.
Though much of the Sahara is uninhabitable, there are a few special places where life can thrive. The Ennedi Mountains in Chad harness a little more moisture from clouds than lower-lying areas enough to support tiny pockets of Savanna. Here rockhyraxes survive on the leaves of acacia trees, a scene more typical of the African plains. These green islands are relics of an older world, one which is slowly vanishing with the march of the desert sands.

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