听力文本

Living longer doesn't necessarily mean living better.

That's the lesson from the tiny roundworm called C.elegans, long a workhorse in basic biology lab work.

The research is in the Proceedings of the National Academy of Sciences.

In the study, thousands of normal C. elegans competed against strains that live days or weeks longer than their brethren, because of factors like genetic mutations or very low-calorie diets.

But a battery of tests to see how the all older worms moved or responded to stress revealed some hard truths:

increased life span did not usually come with a prolonged period of health and strength.

Indeed, the “good times” for each of the worms was roughly the same, regardless of their overall life span.

In other words, the longer-living worms spent a greater proportion of their lives in a diminished state—with less mobility and stress resistance.

Aging worms are not aging humans.

But if the findings do extend to people, then life-extension efforts, such as calorie restriction, may not shake out to a better old age, just more years of frailty.

With associated healthcare cost increases and quality of life decreases.

The researchers suggest that it's time to start thinking about what they call “healthspan”—and maximizing “healthspan,”rather than just tacking on years of poor quality.

中文翻译

长寿并不一定意味着生活品质更好MRY9J^XK^.eDYSStUF。

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6IY#B8GmpnU。

这项研究已经在《国家科学院院刊》上发表a_Mx-oqyI^8wi。

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，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5jHcyQ5N=H[2)HK#q*。

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：

寿命的增加通常并不意味着健康和力量也随之延续y9,sC0O;Ohesm。

事实上，无论整体寿命长短，每条蛔虫的精壮时期大致相同wSDFtx[OqU0!(qSwNm。

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t9SqRaNhS(0*uoI。

衰老的蛔虫并不能和老去的人类划上等号xIFz=]|wFYwR^8QB。

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UuR&L)NQ5-G8]Qj。

而且医疗成本增加但生活质量下降~+#E~z(h+~8_RT!F-。

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，而非数年衰弱状态的寿命~=u&(nTr(x[。

译文为可可英语翻译，未经授权请勿转载！

词语解释

1.compete against 与…抗争

The children compete against each other to reach the other end of the pool.

孩子们互相竞争着抵达池子的另一端D(*v6lgEM,。

They knew they could not compete against business from the U.S.

他们知道他们无法与美国在商业上进行竞争K%tvq)rrVGSSh3O。

2.extend to 延伸到

The main stem will extend to around 12ft, if left to develop naturally.

如果任其自然生长，主干可以长到约12英尺4.i~Hjk-~*RmhT@R8fp。

This year they have introduced three new products to extend their range.

今年他们发布了3种新产品，以扩大产品范围fi#Q7p9yvjI。