where spectacular gatherings of wildlife cope with extreme change... 壮观的野生动物群在那里适应着极端的变化
In the Rockies, seasonal change is swift and dramatic. 落基山脉的季节变换迅速而突然
But the greatest threat they face is change. 但它们眼前的最大威胁已经改变
As the Sun disappears, a profound change takes place in the ocean. 昼去夜至,海洋发生了另一个重大变化
it is their ability to survive annual change, that has enabled them to cover 它们这种在季节变化生存的本领
As the alternation of wet and dry seasons brings change to some tropical forests 干季雨季的交替变换给热带的树木带来了变化
but they have to change their behaviour if they are to gather what they need on the newly flooded plains. 但若想在这块刚被洪水淹没的草原上觅食 狒狒也得改变自己的习性
Africa's baked savannahs undergo a radical change. 经受了太阳烘烤的非洲稀树大草原 发生了天翻地覆的变化
Speeding up the action reveals how these huddles constantly shift and change 在快镜头下我们可以看到包围圈在不断地变动