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为什么树懒这么慢

They ambled through the forests and savannas using their strong arms and sharp claws to uproot plants and climb trees,

它们用强壮的手臂和利爪缓步穿过森林和热带稀树草原，拔除植物，爬树，

grazing on grasses, leaves, and prehistoric avocados.

以青草、树叶和史前牛油果为食。

In fact, we might not have avocados today if not for the giant sloths.

实际上，没有大型树懒就没有今天的牛油果。

英语相关

Smaller animals couldn't swallow the avocado's huge seed,

小动物吞不了牛油果的大种子，

but the sloths could, and they spread avocado trees far and wide.

但史前树懒可以，它们能将其树种传播得更远。

Ground sloths flourished for millions of years,

大懒兽物种繁盛了几百万年，

but around 10,000 years ago, they started disappearing along with the Western Hemisphere's other giant mammals.

却在一万年前开始灭绝，一同灭绝的还有西半球其他巨型哺乳动物。