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次の英文を和訳しなさい。
In the past century U.S. life expectancy has climbed from forty-seven to seventy-seven years, increasing by nearly two thirds. Similar rises happened in almost every country. And this process shows no sign of stopping: according to the United Nations, by 2050 global life expectancy will have increased by another ten years. Note, however, that this tremendous increase has been in average life expectancy -- that is, the number of years that most people live. There has been next to no increase in the maximum lifespan, the number of years that one can possibly walk the earth -- now thought to be about 120. In scientists' projections, the ongoing increase in average lifespan is about to be joined by something never before seen in human history: a rise in the maximum possible age at death. (The Atlantic Monthly, May 2005 より)
――静岡県立大学 前期日程/国際関係学部(2月25日実施)――2006年
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