animals must always adapt to the coming and going of freshwater. 动物必须适应这里时有时无的淡水
Now the pack can regain lost ground. 现在 野犬夺回了优势
The pack won't be able to outswim the lechwe. 非洲野犬虽然水性略逊
The dogs drive the lechwe to where they have the advantage. 非洲野犬将驴羚赶向自己的主场
they can power their way through the water. 能够在水中大步向前
On dry land, the dogs can run at over 40mph. 在陆地上 非洲野犬能以每小时60公里以上的速度奔驰
But when threatened, lechwe always seek the safety of water. 但当驴羚遇到危险时 总是借助水域保护自己
..these residents of the delta are not. 三角洲的另一批居民却还没有适应