Eternal youth could be one step closer following the successful transformation of old human cells into young ones.

随着科学家成功地将人体衰老细胞转换成年轻的细胞，人类距离青春永驻的梦想将更近一步。

The process increases the length of the 'telomeres', which are the protective caps on the end of chromosomes that impact ageing and disease.

端粒体是位于染色体末端的“保护帽”，有助于减缓人体衰老，降低疾病发生率。而将衰老细胞转化为年轻细胞的过程能延长端粒体的长度。

Researchers in the US say the technique could extend human life and provide new hope for battling diseases that arise from old age.

美国研究人员称，此项技术将会延长人类寿命，为治疗各种老年疾病带来新的希望。

Telomeres - often described as being like the plastic caps on the end of shoelaces – help keep DNA healthy.

端粒体常被描述为“鞋带末端的塑料帽”，能使脱氧核糖核酸（DNA）保持健康状态。

These protective end caps become shorter with each DNA replication, and eventually are no longer able to protect DNA from sustaining damage and mutations, causing people to age.

随着每次DNA的复制，这些起保护作用的“末端冒”会变得越来越短，最终将丧失对DNA的保护能力。失去保护层的DNA将会受损并发生突变，人类因此会走向衰老。

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