When the telomeres become very short, the cell starts to malfunction and show signs of ageing.
当端粒变得非常短时，细胞就无法正常工作，会显现衰老的征兆。
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Around three in every 10 nursing positions currently remain unfilled and the report predicts that Caribbean countries will be short of 10 000 nurses to help care for their ageing population by 2025.
Such estimates should be treated with caution. Ageing, at least in the short term, is fairly predictable, so markets may have already discounted its impact on asset prices.