The agouti is the only animal that can disperse the seeds of the brazil nut tree, so the brazil nut tree is completely reliant on the agouti.

拉美刺鼠是唯一能够帮助西胡桃散播种子动物，因此西胡桃完全依赖这种动物。

Now, the brazil nut tree needs the agouti, way down there, to disperse the seeds.

西胡桃树需要地面上刺鼠散播种子。

The agouti needs the female orchid bee up here to pollinate the flowers so those seeds are produced in the first place.

刺鼠需要雌性兰花蜂为花朵授粉，保证能够产生种子。

And you know, I can guarantee that every brazil nut that you've ever cracked open has come from a tree that was planted by one of these animals.

嗯，敢打赌，你吃每一颗西胡桃，都是从刺鼠埋下种子长成大树上结出。

But what has all of this got to do with our story of brazil nut trees and agoutis?

这个又跟西胡桃树有什么关系？跟刺鼠有什么关系？

Humans, some primates, some bats, the elephant shrew and the spiny mouse menstruate.

人类、某些灵长类动物、某些蝙蝠、象鼩和刺鼠会来月经。