But developed countries have a humanitarian responsibility too.

发国家也有人道主义的责任。

In most rich countries, land-value taxes account for a small share of total revenues.

在大部分发国家，地价税只占总收入中很小的一部分。

Even so, the U.S. lags behind other wealthy nations in advances in population health.

尽管如此，美国在人口健康进步上仍落后于其他发国家。

On the other hand, interests are not evenly shared by every stratum of society.

另一方面，在发国家内部和发展中国家内部，社会各阶层的利益分享也不均衡。

That's more feasible in richer nations.

这在发国家更为可行。

Okay, so in the developed world, the average life expectancy is increasing.

好的，所以在发国家，平均预期寿命正在增加。

And rich countries have the resources to do this, whilst poorer countries don't.

发国家有资源去应对这些变化，然而贫困国家并不能。

55. What does the author imply people in developed countries should do to keep healthy?

55. 作者暗示发国家的人们应该如何保持健康？

Developed countries sometimes offer food and aid to developing ones, but at a price.

发国家有时会向发展中国家提供粮食和助，这是有代价的。

A vaccine ended polio in the developed world more than 50 years ago.

50多年前，一种疫苗结束了发国家的小儿麻痹症。

51. What can we learn from research on diets in developed countries?

51.我们可以从发国家的饮食研究中学到什么？

New Zealand has one of the lowest adult smoking rates among developed countries.

新西兰是发国家中成年人吸烟率最低的国家之一。

In fact, in the developed parts of the world, more than 80 years.

在发国家甚至超过80年。

First, compare the US to other developed nations.

首先，将美国与其他发国家进行比较。

So the U.S. is spending twice as much per person as most other developed countries.

因此，美国人均医疗支出是其他大多数发国家的两倍。

She says that people in developed countries may have more money.

她说，发国家的居民也许有很多钱。

For many years, developed countries produced and used the largest crops of potatoes.

多年来，发国家的土豆产量和使用量最大。

It wants to see rich countries transfer new technology and knowledge to poorer nations.

它希望看到发国家向贫困国家转移新技术和知识。

Definitely. Many developed countries are trying to develop alternative energy to ease oil shortage.

的确。许多发国家正努力开发可替代能源，来缓解石油短缺的现状。

What's weird is that in developed countries, allergies seem to be getting more common.

奇怪的是，在发国家，过敏似乎越来越普遍。