Botswana lies in the arid(不毛的,贫瘠的) basins of southern Africa, much of it within the Kalahari(喀拉哈里沙漠) Desert. But in the north, there is an immense oasis(绿洲) called the Okavango Delta. Created by the floodwate

发表于:2019-01-22 / 阅读(76) / 评论(0) 分类 自然百科2010年