It's no bigger than a ping-pong ball. 它的体型还没有乒乓球大
Avoiding the extreme heat imposes a rhythm on desert life. 为躲避难耐的高温 沙漠动物有了自己的节奏
Every year, a further 50,000 square miles of grass and farmland 每年都有近十三万平方公里的草地和农田
would mean a slow and painful death. 就意味着死前将饱受折磨
If a stallion can control access to water, 如果一头公马能够控制饮水权
Carrying a quarter of his body weight in water, 带着自身体重四分之一的水