Some analysts say these figures hide a large underground economy.

一些分析家认为，西班牙的失业率之所以这么高，可能是由于地下经济在作怪。

Now we'll take you through the underground economy itself.

我要带你了解一下地下经济本身。

And in developing countries, the underground economy accounts for more than a third of economic output.

在发展中国家，地下经济占经济产出的三分之一以上。

But economists worry that the growth of the underground economy can set off a negative cycle.

但经济学家担心地下经济的增长会引发一个恶性循环。

A greater demand for cash in an economy might signal a larger underground economy.

一个经济体的现金需求更大可能预示着一个更大的地下经济。

In the US, the underground economy is probably worth somewhere between one and two trillion dollars.

在美国，地下经济的估值可能在一万亿到两万亿美元之间。

She and her colleagues are in the Harvard Forest greenhouse setting up an experiment to study an underground economy.

她和她的同事研究正在哈佛森林温室进行实验，来研究地下经济。

As you might guess, it's hard to measure exactly how big this underground economy is, which makes some sense.

你可能猜到了，地下经济的规模很难准确衡量，这是有道理的。

But the underground economy can offer jobs and work where they don't otherwise exist.

但是地下经济可以提供本来不存在的工作。

So what exactly do we mean when we talk about the underground economy?

那么，我们在谈论地下经济时到底是指什么呢？

Here's the annoying thing, though: it's really hard to get good data on underground economies.

但令人恼火的是，人们很难获得地下经济的优秀数据。

Since most of the transactions that take place in the underground economy take place in cash.

因为大多数地下经济的交易都是以现金形式进行的。

Thomas says that the underground economy gets people what they want.

托马斯说，地下经济可以让人们得到他们想要的东西。

There is an entire underground economy in this country, which serves an important purpose.

这个国家有一个完整的地下经济，它有一个重要的目的。

Here's the annoying thing, though: it's really hard to get good data on underground economies.

达夫：不过，令人烦恼的是：获得有关地下经济的良好数据确实很难。

But we haven't actually mapped most forests — and because of this, it's hard to track global trends in these underground nutrient economies.

但大部分森林我们还没了解真菌信息，因此很难追踪这种地下养分经济的全球趋势。

The " underground economy, " for example, could refer to people who work without the government knowing about it and without paying taxes.

例如， “地下经济”可以指在政府不知情的情况下工作并且不纳税的人。

He believes in hard work and has tried gigs in both the licit and underground economies, but he hasn't had any luck and is just trying to find his way and still dances between both worlds.

他相信努力工作， 并尝试过在合法和地下经济中演出，但他没有任何运气， 只是试图找到自己的方式， 并且仍在两个世界之间跳舞。