This is one of the reasons why some males birds have exotic plumes, why elk carry hefty antlers , and why male fiddler crabs have such large claws.

这就是为什么一些雄鸟长着充满异国情调的羽毛，为什么麋鹿拥有巨大的鹿角，为什么雄性招潮蟹有这么大的爪子的原因之一。

youdao

If an ancient animal had structures that looked like antlers, palaeontologists would argue that it probably used them as an elk or moose.

如果一种古代动物有看起来像鹿角的结构，古生物学家就会争论说它可能像麋鹿或驼鹿那样使用鹿角。

youdao

This is one of the reasons why some males birds have exotic plumes, why elk carry hefty antlers (a sign of a healthy immune system), and why male fiddler crabs have such large claws.

这正是大自然为什么让一些雄鸟长着充满异国情调的羽毛或让麋鹿拥有大而笨重的鹿角(这也是一个生态系统健康的标志)的原因之一。

youdao