而且细胞分裂时可能会产生致命的基因复制错误。据此怀疑主义者们说，走向衰老仍是人类不可避免的未来。
Add that to the dangerous genetic copying errors that occur as cells divide and, for these naysayers, growing old remains an unavoidable future for humanity.
端粒酶的主要功能是复制端粒末端dna，维持端粒长度。端粒酶活性调节与肿瘤发生和细胞衰老有着密切关系。
The main function of telomerase is for the replication of telomere DNA, which is closely related with tumor and cell senescence.
细胞分裂中染色体因其末端的DNA不能完全复制而短缩，使细胞逐渐失去增殖能力，导致细胞衰老、死亡。
In cells division chromosome length is shorten for the ending DNA couldn't be replicated completely, and the loss of telomere DNA will lead to senescence and death.
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