There are steps you can take to help reduce abdominal fat and maintain lean muscle mass as you age in order to protect both your physical and mental wellbeing.

你可以在年龄增长的过程中采取一些措施来减少腹部脂肪，保持精瘦肌肉含量，从而维持你的身心健康。

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As we move from the industrial age to the information age, societal demands on our mental capabilities are no less taxing.

随着我们从工业时代过渡到信息时代，社会对我们的思维能力的要求也越来越高。

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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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At the end of the week, At the end of the week, both mental and biological age decreased.

在一周结束时，在一周结束时，心理和生理年纪都减小了。

哈佛公开课 - 幸福课课程节选

But on Monday, Gov. Ronnie Musgrove granted a temporary reprieve for Foster, citing concerns about his age and mental competency at the time of crime.

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The Disney-sounding financial prodigy is deemed, at 11, to have the mental age of the average American adult.

ECONOMIST: William Gaddis

He was 27 but had a mental age of between six and ten.

BBC: Apology after man shot dead by Army in 1974