Passage Translation 2If your great grandp
题型：问答题
问题：
Passage Translation 2If your great grandparents were born in a rich country in the early 1900s, their lifespan would have been about 50. Today people in developed countries have a life expectancy of 80 or more. This is because the improvements of public health, such as running water and flushing toilets and then medical care. But these improvements have mostly benefited richer nations. There are still places in the world that don’t have clean water, enough food and enough doctors. So people there often suffer from famine and disease.