Dr. Preston acknowledges that the United States might do more to keep young and middle-aged people from getting sick, but he says it’s not clear that other countries’ systems are more effective.

普雷斯顿博士也承认，美国应该更重视维护年轻人和中年人的健康，降低他们染病的可能，不过他不认为，其他国家在这方面就一定做得更好。

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Second, tilting the tax and benefit system towards people with children has transferred money from the young to the middle-aged.

其次，将税收与福利制度向有子女的人倾斜使得年轻人的钱转向中年人群。

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At the same time, it is important to note that around one third to half of the severe and fatal infections are occurring in previously healthy young and middle-aged people.

同时，必须注意到，严重和致命感染病例中约有三分之一到半数是原本健康的年轻人和中年人。

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Migraine headaches are most common among young adults and middle-aged people.

VOA: special.2009.03.18

And elderly people unable to work should get the same benefits as young people and middle-aged people unable to work.

ECONOMIST: Letters

They were young and middle-aged workers, people who lived in Beijing but did not have the much-prized residency permit that would allow them to settle with their families.

BBC: Changing China seen from the 'hard seats' of a train

Most important of all, in offices, on construction sites, on football pitches around the world, the great, complex, social, co-operative endeavours which typify our species and make us human, in all of these you find middle-aged people telling supposedly sharper and stronger young adults what to do.

BBC: Viewpoint: Just what is middle age?