The study from the University of Tennessee selected 169 married couples aged under 35 and asked them to fill in questionnaires every six months.

有169对35岁以下的夫妻参与了田纳西大学的此项研究，他们每半年需要填写一次调查问卷。

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The study is open to all children aged 12 and under.

这项调查对所有12岁及12以下的孩子公开。

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About 90% of malaria deaths each year occur in Africa and 92% of those are children aged under five.

每年因疟疾而失去生命的人有90%是非洲人，92%是五岁以下的儿童。

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The centre-left candidate, Pier Luigi Bersani, said in Milan on Sunday night that the country was facing ruin whilst Mr Berlusconi was preoccupied with Ruby - the young woman he is accused of paying as an under-aged prostitute.

BBC: Italy: Berlusconi spots his opening

Instead, his second term focused on deficit reduction, Medicare reform, implementing welfare reform and narrower measures such as the creation of the v-chip to protect under-aged television viewers from edgy programs and the expansion of Medicaid to cover children.

CNN: What would a second Obama term bring?

Over the past century, the age profile of the population has become much older, with the proportion aged under 15 falling from 32% in 1911 to 16% last year, while the proportion aged 65 and over has increased from 5% to 17%.

BBC: Census shows 'highest' Scottish population ever