"It really raises the question of what should be considered normal ageing," says Kenneth Manton, a demographer from Duke University in North Carolina.
北卡罗来纳州杜克大学人口统计学家肯尼斯·曼顿说：“这确实引发了一个问题，即什么是正常的老龄化。”
After we turn 60, taste and smell gradually decline, partly as a result of the normal ageing process.
我们60岁以后，味觉和嗅觉逐渐下降，部分因为正常的衰老过程。
After we turn 60, taste and smell gradually decline, partly as a result of the normal ageing process.
我们60岁以后，味觉和嗅觉逐渐下降，部分因为正常的衰老过程。
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