and an ibex that has fallen to its death. 和一头摔死的羱羊
as it has done for millions of years. 几百万年来一直如此
The cheetah has lost a lot of ground... 猎豹节节败退
The herd has its own defense against the cheetahs' blistering speed. 兽群自有 对抗猎豹惊人速度的防御策略
But being big has other implications... 但庞大也有别的影响
...and ensures it has reserves to get through leaner times. 并能够有所储备 以便挺过食物较少的时期