科学美国人60秒:长寿不一定有良好的身体状态-托福听力下载

　　科学美国人60秒中文翻译：

　　Living longer doesn't necessarily mean living better. 长寿并不一定意味着生活品质更好。

　　That's the lesson from the tiny roundworm called C.elegans, long a workhorse in basic biology lab work. 这是从一种名为线虫的小蛔虫身上汲取的经验，这种小生物一直是基础生物学实验室的工作主力。

　　The research is in the Proceedings of the National Academy of Sciences. 这项研究已经在《国家科学院院刊》上发表。

　　In the study, thousands of normal C. elegans competed against strains that live days or weeks longer than their brethren, 研究中成千上万的普通线虫同比它们多活几天或几周的菌株进行比较，

　　because of factors like genetic mutations or very low-calorie diets. 而菌株长寿的秘诀在于基因突变或非常低热量的饮食等因素。

　　But a battery of tests to see how the all older worms moved or responded to stress revealed some hard truths: 但经过对于所有活的更久蛔虫继续生存及应对压力的一连串测试则表现出一些残酷的事实：

　　increased life span did not usually come with a prolonged period of health and strength. 寿命的增加通常并不意味着健康和力量也随之延续。

　　Indeed, the good times for each of the worms was roughly the same, regardless of their overall life span. 事实上，无论整体寿命长短，每条蛔虫的精壮时期大致相同。

　　In other words, the longer-living worms spent a greater proportion of their lives in a diminished state—with less mobility and stress resistance. 换句话说，长寿的蛔虫则在退化的运动性及抗压性状态上花费更多精力。

　　Aging worms are not aging humans. 衰老的蛔虫并不能和老去的人类划上等号。

　　But if the findings do extend to people, then life-extension efforts, such as calorie restriction, 但如果这项研究延伸至人类，那么限制热量摄入这种延年益寿措施

　　may not shake out to a better old age, just more years of frailty. 可能并不会使得晚年生活更好，反之获得的只是衰弱的数年。

　　With associated healthcare cost increases and quality of life decreases. 而且医疗成本增加但生活质量下降。

　　The researchers suggest that it's time to start thinking about what they call healthspan—and maximizing healthspan, 研究人员认为是时候考虑健康寿命及将之付诸于最大化的问题，

　　rather than just tacking on years of poor quality. 而非数年衰弱状态的寿命。

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