During this critical phase, there will be too few young, productive people who can produce the prosperity required to care for the country's aging population.

在那个紧要阶段，将会有太少的年轻，有生产力的人可以营造能够负担照顾这个国家老年人口的富足。

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But in working out some of the critical mechanisms, researchers have noticed that the epigenetic part of the genome seems to play crucial roles in growth, aging and cancer.

然而，在解开其中一些攸关紧要的机制后，研究人员注意到基因组的外遗传部份对于生长、老化及癌症，似乎扮演了决定性的角色。

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There are a series of genes in cell which determin cellular growth, differentiation, aging and death (3) Critical telomere shortening.

生命钟基因控制着细胞程序衰老。 生物体细胞内存在一系列基因，它们控制着细胞的生长、分化、老化和死亡。

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Greece has an aging population and the need to restructure the social system to contain welfare costs has gone beyond critical.

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