在线观看亚洲精品专区-在线观看亚洲免费-在线观看亚洲免费视频-在线观看亚洲欧美-欧美freexxx-欧美free嫩交video

食品伙伴網服務號
 
 
當前位置: 首頁 » 專業英語 » 英語短文 » 正文

人類的壽命極限在逐漸延長

放大字體  縮小字體 發布日期:2008-06-14
核心提示:John R. Wilmoth, a demographer(人口統計學家) at the University of California, Berkeley, has collected a wealth of data on humankind's increasing longevity(壽命) over the past two centuries. And this week in Science(美國《科學》雜志), he has some goo


    John R. Wilmoth, a demographer(人口統計學家) at the University of California, Berkeley, has collected a wealth of data on humankind's increasing longevity(壽命) over the past two centuries. And this week in Science(美國《科學》雜志), 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(仔細審查) 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."

 

更多翻譯詳細信息請點擊:http://www.trans1.cn
 
關鍵詞: 人類 壽命 極限
[ 網刊訂閱 ]  [ 專業英語搜索 ]  [ ]  [ 告訴好友 ]  [ 打印本文 ]  [ 關閉窗口 ] [ 返回頂部 ]
分享:

 

 
推薦圖文
推薦專業英語
點擊排行
 
 
Processed in 0.526 second(s), 17 queries, Memory 0.89 M
主站蜘蛛池模板: 动漫精品成人免费网站 | 激情欧美一区二区三区中文字幕 | www.黄网站| 窝窝午夜在线观看免费观看 | 大片毛片女女女女女女女 | 你懂的 在线观看 | 五月婷婷久 | 国产精品久久久久久久久久影院 | 日韩三级 | 亚洲婷婷在线视频 | 免费亚洲一区 | 你懂得在线网址 | 欧美一级片在线免费观看 | 在线观看亚洲人成网站 | 99热久久精品最新 | 波多野结衣的毛片 | 免费的很黄很色的床小视频 | 五月婷婷综合基地 | 色涩在线观看 | 中文字幕佐山爱一区二区免费 | 在线 | 一区二区三区四区 | 色噜噜噜噜 | 欧美xingai| 五月婷婷六月丁香综合 | 伊人网色 | 99热最新 | a色在线| 午夜黄色影院 | 91av在线免费观看 | 天天干夜夜爽天天操夜夜爽视频 | 一级做a爱片在线播放 | 15—16女人毛片 | 亚洲综合成人网 | 五月婷婷激情五月 | 天堂视频网 | 国产chinesetube| 天堂网在线最新版www中文网 | 天天做天天爽天天谢 | 色多多福利 | 爱逼色 | 亚洲午夜精品一区二区 |