Declining mental function is often seen as a problem of old age, but certain aspects of brain function actually begin their decline in young adulthood, a new study suggests.

心智功能衰退通常被视为老年问题，但一项新的研究表明，大脑功能的某些方面实际上在青年时代就开始衰退了。

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But if most of a group are old and one person is young, that difference is exaggerated and those trying to guess the individual's age are "consistently wrong" said the research。

但是，研究显示如果一个小组大部分成员都比较年长，而一个人较年轻，年龄猜测的准确率明显下降。 猜测者估计的年龄要和被猜测者的实际年龄"相差万里"。

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So no matter what your age, young or old, remember it is not your age, but your attitude towards life that will bring happiness.

因此，不管你有多大，年轻还是年老，记住，不是年龄，而是你对生活的态度才会带来快乐。

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Conservatives can point to comprehensive reform packages that will actually augment the safety net, so that it better fulfills the promise of preventing poverty in old age, but without imposing an economy-crushing burden on young workers.

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And today he offers an optimist's reflection on the loss, saying it came at perhaps an ideal age, when he was old enough to retain a strong visual archive of his surroundings but young enough to adapt.

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