get shorter and shorter 变得越来越短
When autumn comes, days get shorter.
秋天来临的时候,白天变短了。
So after each division, the telomeres get shorter and one of the things that may happen after a while is that pieces of the genes themselves get broken off the Chromosomes.
每次分裂后,端粒变短一段时间后可能发生的一件事是染色体上的基因片段会断裂。
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