2023年医学考博英语人类的寿命极限在逐渐延长
考博英语是考博中重点考察的科目，想要更好的拿到高分成绩，对于同学来说，大家在实际的备考中，需要更全面的复习。考博英语考察的内容比较多，基础词汇、听力、阅读以及翻译技巧，还有写作，这是都是一套卷子的基本构成。那么对于每个部分，应该进行有针对性的训练。下面小编为大家整理了“2023年医学考博英语人类的寿命极限在逐渐延长”，供大家参考。
John R. Wilmoth， a demographer(人口统计学家) at the University of California， Berkeley， has collected a wealth of data on humankind's increasing longevity(寿命) over the past two centuries. And this week in Science(美国《科学》杂志)， he has some good news： The maximum average age we can reach too is on the rise. This finding contradicts the common scientific belief that life span has a biological upper limit of 120 years or so. "Whether 115 or 120 years， it is a legend created by scientists who are quoting each other，" Wilmoth says. (He is shown at right with Christian Mortensen， who died in 1998 at the age of 115.)
Working with colleagues in the U.S. and Sweden， Wilmoth scrutinized(仔细审查) the Swedish national death records——considered the best in the world——from 1861 forward. They found that ages at death had shifted upward for 138 years——a trend that accelerated in the 1970s. Although some scientists presumed the larger number of very old people in later years was due simply to a larger population base， the new data show the main cause is actually increased survival after age 70. "We have shown that the maximum life span is changing，" Wilmoth adds. "It is not a biological constant."
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