Is our civilization widening and deepening, or is it fraying out?
我们的文明是在扩大和深化呢，还是在支离破碎？
The run-up to next year’s five-yearly NPT review conference offers a chance to bolster the fraying anti-proliferation regime.
五年一次、将于明年举行的核不扩散条约审议大会的预备阶段为我们提供了一次强化日渐瓦解的反扩散体系的机会。
Each time a cell replicates itself (as it does before it dies), the telomeres shorten, like plastic tips fraying on the end of shoelaces.
细胞每复制自己一次(细胞在死亡之前都会如此)，其端粒就会缩短，就像鞋带的塑料头会磨损一样。
Telomerase is known to protect telomeres which stop the string of DNA unravelling much like the plastic tips at the ends of shoelaces stop fraying.
正如人们所了解的，端粒酶因其能够保护端粒，从而阻止DNA链的分离，就像鞋带末端的塑料能防止其受到磨损。
Finish it off by burning the end of the thread to prevent fraying.
完成后把线线的末端烧一下以防磨损。
Telomeres stop chromosomes from fraying, clumping together and "scrambling" genetic code.
端粒能够使染色体避免磨损、凝结以及“扰乱”遗传密码。
These are caps on the ends of chromosomes that protect the DNA in them from damage, much like caps on shoelaces prevent fraying.
这是染色体末端的帽子，保护内部的DNA不受破坏，就像鞋带头上的绳花让鞋带不散毛。
We've all experienced the irritation of a much-loved dress or top shrinking in the wash, coming apart at the seams or fraying at the hem.
我们都经历过痛失一条心爱裙子或上衣的时刻，它们有的洗后缩水，有的沿着缝迹开裂，有的在边缘处磨损。
Stephen, an elbow rested on the jagged granite, leaned his palm against his brow and gazed AT the fraying edge of his shiny black coAT-sleeve.
斯蒂芬一只肘支在坑洼不平的花岗石上，手心扶额头，凝视着自己发亮的黑上衣袖子那磨破了的袖口。
46stephen, an elbow rested on the jagged granite, leaned his palm against his brow and gazed at the fraying edge of his shiny black coat-sleeve.
46斯蒂芬一只肘支在坑洼不平的花岗石上，手心扶额头，凝视着自己发亮的黑上衣袖子那磨破了的袖口。
The discovery of a biological gatekeeper that prevents genetic code from fraying with age has won a trio of American scientists this year's Nobel prize for medicine.
三位美国科学家因发现了防止遗传密码随着年龄增长而磨损的一种生物守护机制而共同赢得了今年的诺贝尔医学奖。
A few tribes drifted elsewhere or took up farming, but the Arab herders stuck to their fraying livelihoods-nomadic herding was central to their cultural identity.
一些部族迁徙到了其他的地方从事耕作，然而阿拉伯人却坚守传统的生计——游牧是这一民族文化的中心。
Blackburn and Szostak determined that it was a specific DNA sequence in the telomeres that kept chromosomes from fraying whenever they were copied when a cell splits in two.
布莱克本和卓斯塔克测定，端粒中一段特殊的DNA序列在细胞分裂染色体自我复制时保护了染色体免受损耗。
When these were injected into yeast, the DNA sequence protected the chromosomes when they were copied, just as the plastic tips at the ends of shoelaces stop them from fraying.
当这些微型染色体注入到酵母细胞中后，在细胞分裂时，这种CCCCAA的DNA序列在复制时对染色体起到了保护作用，就像鞋带末端的塑料帽对鞋带起到的防磨损作用。
When these were injected into yeast, the DNA sequence protected the chromosomes when they were copied, just as the plastic tips at the ends of shoelaces stop them from fraying.
当这些微型染色体注入到酵母细胞中后，在细胞分裂时，这种CCCCAA的DNA序列在复制时对染色体起到了保护作用，就像鞋带末端的塑料帽对鞋带起到的防磨损作用。
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