High grade matsutake hides deep in the earth.

质高的松茸都隐藏在土层之下。

The permafrost turned out to be loaded with genetic material.

这些冻土层中原来含有大量遗传物质。

We only found out about the permafrost When it was too late.

等我们发现冻土层时 却为时已晚。

Permafrost is a layer of soil in the world's Arctic and Antarctic areas.

冻土层是世界北极和南极地区的层土壤。

The researchers also searched the permafrost for new clues to the age of the fossils.

研究人员还在冻土层中寻找化石年代的新线索。

They make the humus, the fertile layer to which all life on land is linked.

它们造腐植土，在这肥沃的土层上所有陆上生命互相紧扣。

Methane gas somehow accumulates in the permafrost of Siberia.

甲烷气体以某种方式积聚在西伯利亚的冻土层中。

Management of forests, transportation, the oceans, the melting of the permafrost.

与森林，交通，海洋，和冻土层的融化都有关系。

The winter bamboo shoot hides in the earth, and is hard to find on the surface.

冬笋藏在土层的下面，从竹林的表面上看什么也没有。

This exposes the ground and enables deeper freezing of the permafrost during the winter, protecting it from further degradation.

这冻土层在冬更加冻结，防止其进步退化。

So, you're seeing at the topsoil, you have the water table, the different layers underneath the ground.

大家可以看到表土层，地下水位，还有地下不同的分层。

Now normally the permafrost would prevent the growth of plants because they cannot establish roots.

通常来说，冻土层会阻止植物生长，因为它们无法生根。

Under the right conditions, however, such as the extreme cold of Arctic permafrost, this decay can be slowed.

然而，在适当的条件下，比如极寒的北极冻土层，分解的速度可以减缓。

But since the shrubs roots don't grow very deep anyways, the permafrost doesn't impact their growth at all.

但是由于灌木丛的根长得并不深，所以冻土层根本不会影响它们的生长。

The researchers say as more frozen soil warms up, more plant roots are becoming exposed to microorganisms.

研究人员说，随着越来越多的冻土层解冻，越来越多的植物根系接触到微生物。

The pearl shells are put into pits dug in the earth, where mats are spread to receive them.

于是，要把含有珍珠的贝壳放到在土里挖好的坑中，在贝壳下面的土层上再垫层垫子。

During this time of plenty, the foxes will bury any extra food, digging right down to the permafrost layer beneath.

在这食物充沛的时期，狐狸会将多余的食物埋藏起来，它们直挖到地下的冻土层。

You can find them in the permafrost, right?

你可以在冻土层找到它们， 对吧？

And that's even more true when the economy is actually underground — when it's all happening under a layer of dirt.

当经济在地下时——切都发生在土层下面——这更为真实。

So you have wedges of ice in the permafrost.

所以你在冻土层中有冰块。