- their huge numbers the most obvious sign of this exceptional success.
它们庞大的数量 就是巨大成功的最明显的标志 - But just as some mammals evolved to feed on the grass,
但在一些哺乳动物 进化成以草为食的同时 - others evolved to feed on the grazers.
另一些哺乳动物 则进化为以食草动物为食 - Hunters.
猎手 - 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 - Many eyes...
许多双眼睛 - ...spot the danger early.
很早就发现了危险
Hunters. 猎手
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