But developed countries have a humanitarian responsibility too.

但发达国家也有道主义责。

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

多年来，发达国家土豆产量和使用量最大。

However, the wealthy ones have lower percentages of modern slavery among workers.

只是发达国家中，工遭受现代奴役所占比例相对少一些。

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

尽管如此，美国在口健康进步上仍落后于其他发达国家。

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

另一方面，在发达国家部和发展中国家部，社会各阶层利益分享也不均衡。

That's more feasible in richer nations.

这在发达国家更为可行。

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

发达国家有资源去应对这些变化，然而贫困国家并不能。

Currently, he's talking about exporting to developed countries.

最近，他在考虑把产品出口到发达国家。

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

55. 作者暗示发达国家应该如何保持健康？

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

50多年前，一种疫苗结束了发达国家小儿麻痹症。

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

51.我可以从发达国家饮食研究中学到什么？

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

新西兰是发达国家中成年吸烟率最低国家之一。

And this progress has not just been achieved in rich countries.

不仅仅是发达国家取得了这样进步。

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

在发达国家甚至超过80年。

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

因此，美国均医疗支出是其他大多数发达国家两倍。

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

她说，发达国家居民也许有很多钱。

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

它希望看到发达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.

确。许多发达国家正努力开发可替代能源，来缓解石油短缺现状。

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

奇怪是，在发达国家，过敏似乎越来越普遍。

The poor would pro-create endlessly and overrun the developed world.

穷会不断生育并超过发达国家。