2022考研英语阅读压力和老化Stress and ageing A question of attitude
压力和老化一个态度问题高校招聘网
The link between chronic stress and a marker of old age is being dintangled
科学家发觉了长期压力与一个年轻标志间的联系
德莱文皮肤TELOMERES are to chromosomes what plastic caps are to shoelacesthey stop them frayingat the ends.
端粒之于染色体，犹如塑料帽之于鞋带它们阻挡了其末端的磨损。
Unlike shoelaces, though, chromosomes replicate themlves from time to time as the cellsthey are in divide.
和鞋带不同的是，随着它们所在细胞的分裂，染色体可以不断进行复制。
This shortens the telomere and, after 50-70 such divisions , 这种复制过程使端粒不断缩短，并且，在经过50到70次的细胞分裂后，
a chromosome can grow no shorter and the cell it is in can divide no more.
染色体的缩短达到极限，细胞分裂活动也从今终止。
That provides a backstop against cancer. The rapidly dividing cells in a tumour soon hit theHayflick limit and the
process is brought to a screeching halt.
这一机制有助于对抗癌症。快速分裂的细胞不久就会到达其海弗利克界限，使得该过程能够急刹车。这是个好现象。
Which is a good thing. The bad thing is that reaching the limit is one of the markers of oldage.
不利之处则是，细胞到达复制次数的极限是老化的标志之一。
You do not want it to happen too quickly, particularly in tissues that have to do a lot ofdividing in order to work properly, such as tho in the immune system.
人们不想让这个过程发生的太快，尤其对于那些需要不断分裂才能够得以正常运作的组织而言，例如免疫系统组织。
梦见暴风雪
It has been known for some time that chronic stress caus premature shortening of the telomeres.
人们已经得知，长期的压力可以使端粒的缩短提前发生。
培训会议通知What has not been clear is whether this is a one-way trip, with each stressful period turningthe telomeric ratchet irreversibly.
然而人们对于该过程是否单向进行尚不明确。
This week, though, at a meeting of the American Association for Cancer Rearch in Orlando,Florida, a group of
rearchers led by Edward Nelson of the University of California, Irvine,showed that it isn t.
然而，本周在美国癌症讨论学会于佛罗里达州奥兰多召开的会议上，加州高校尔文分校由爱德华?尼尔森领导的讨论团队发觉，这一过程是可逆的。
Stress and ageing A question of attitude
压力和老化一个态度问题
The link between chronic stress and a marker of old age is being dintangled
科学家发觉了长期压力与一个年轻标志间的联系
TELOMERES are to chromosomes what plastic caps are to shoelacesthey stop them frayingat the ends.
银元收藏
端粒之于染色体，犹如塑料帽之于鞋带它们阻挡了其末端的磨损。
Unlike shoelaces, though, chromosomes replicate themlves from time to time as the cellsthey are in divide.
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和鞋带不同的是，随着它们所在细胞的分裂，染色体可以不断进行复制。
This shortens the telomere and, after 50-70 such divisions , 这种复制过程使端粒不断缩短，并且，在经过50到70次的细胞分裂后，
a chromosome can grow no shorter and the cell it is in can divide no more.
染色体的缩短达到极限，细胞分裂活动也从今终止。
That provides a backstop against cancer. The rapidly dividing cells in a tumour soon hit theHayflick limit and the process is brought to a screeching halt.
这一机制有助于对抗癌症。快速分裂的细胞不久就会到达其海弗利克界限，使得该过程能够急刹车。这是个好现象。
Their rearch suggests that stress management not only stops telomeres from shortening,it actually promotes their repair.
他们指出，抗压力训练不仅可以组织端粒缩短，也可以促进其修复。
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Dr Nelson drew this welcome conclusion from a previous study that measured the impactof telephone counlling on women who had been treated for cervical cancer.
尼尔森博士通过对接受宫颈癌治疗的妇女电话询问影响作用的讨论，得出了这一可喜的结论。
红旗飘呀飘The study found that such counlling worked, both mentally and physically.
他们之前的讨论发觉，询问在心理和生理上都产生了作用。
Women who had been counlled reported that the quality of their lives had improved,compared with tho of a control group who had not been counlled.
接受询问的妇女报告其生活质量得到提高。
They also showed improvements in the strength of their immune systems.
她们还显示出免疫系统功能的增加。
Given tho benefits, Dr Nelson wondered if he could find others, and he re-examined theparticipants samples to look at the lengths of the telomeres in their white blood cells .
由于询问的上述好处，尼尔森博士想知道该讨论是否能有更多的发觉。他重新检查了被试的血液样本，试图获得白细胞端粒长度的信息。
