英语听力：2012-02-22 从南极到北极 From Pole To Pole—16（在线收听）

 This is in Africa rarely seen, a lush water world. Some creatures are completely at home here. These are lechwe, antelope with hooves that splay widely enabling them to move at speed through the water. For others, the change is far less welcome. Baboons are somewhat apprehensive bathers. The water brings a season of plenty for all animals. Hunting dogs. These are now among the rarest of Africa’s mammals. But they are nonetheless the continent’s most efficient predators.