is ready to hunt at a moment's notice. 但这只豹子已经做好了随时启动捕猎的准备
When it does fall, it can transform a desert. 雨水可以重塑沙漠
But there's no match for a mother's determination. 但母亲的决心战胜了一切
At last, one of the troop's scouts finds a tiny trickle on a rock face. 终于 一只狒狒在岩石表面发现了一条细流
Not a single drop of rain has fallen here for eight months. 这里已经足有八个月没下过一滴雨了
A wall of dust up to a mile high, 一堵近两公里高的由沙尘构筑的墙
A quarter of the world's people live in arid lands. 世界上四分之一的人口居住在干旱地区