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。
On 11 December 1951, Wilkins wrote an official letter to Crick requesting the Cambridge team stop working on DNA.
1951年12月11日，威尔金斯给克里克写了一份公函，要求剑桥小组停止研究DNA。
When they're behaving normally, cells know when to stop replicating based on instructions encoded in their DNA.
当它们行为正常时，细胞根据DNA编码的指令知道何时停止复制。
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