Did you ever see a chest nut tree?

你是否见过栗子树呢？

They go merrily over the crisp, white frost to the chest nut trees.

他们轻快地踏过易脆的白霜，向栗子林进发。

Because quite naturally, this has come from a brazil nut tree.

这个是从巴西胡桃树上摘下来的。

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

巴西胡桃树需要地面上的刺鼠散播种子。

And why can't this mighty brazil nut tree survive without an orchid and this nimble little rodent?

为什么这种看似十分强壮的巴西胡桃树离开了兰花和这种小啮齿动物就活不了？

Once a year, the tips of the brazil nut tree branches are adorned with large white flowers.

巴西坚果树每年开一次花，树枝被白色花朵装饰了起来。

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

这个又跟巴西胡桃树有什么关系？跟刺鼠有什么关系？

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巴西胡桃散播种子的动物，因此巴西胡桃完全依赖这种动物。

They have been overtaken by American farmers, notably in California, cultivating nut trees brought from Iran almost a century ago.

他们已经被美国农民取代，特别是在加利福尼亚州，种植近一个世纪前从伊朗带来的坚果树。

The intricate relationship between the male orchid bee and the flowers is the reason that brazil nut trees like this one can only grow in intact rainforest ecosystems.

雄性兰花峰和花朵的关系是巴西胡桃树为什么只能在原始的热带雨林生态中生长的原因。

This tall and ancient brazil nut tree produces nuts that we can eat; these water lilies are big enough to lie down on.

这棵高大古老的巴西坚果树生产出可供我们食用的坚果；这些睡莲大到可以躺在上面。

The forest itself consisted entirely of nut trees—walnuts, filberts, almonds and chestnuts—so there would be plenty of wholesome food for them while they remained there.

森林本身完全由坚果树组成——核桃、榛子、杏仁和栗子——所以当他们留在那里时，他们会有大量有益健康的食物。

This selective door policy is the tree's way of ensuring that it will only be used by insects which are guaranteed to visit other brazil nut tree blooms and then pollinate them.

胡桃树用这种选择性的进入门槛，确保进入自己花朵的蜜蜂有能力进入其他的胡桃花并完成授粉。