Men tend to put on weight in middle age.

男人到了中年体重往往会增加。

《柯林斯英汉双解大词典》

Symptoms of Huntington's disease usually start in middle age.

亨廷顿氏舞蹈症的症状通常开始于中年。

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In middle age, when a down-man, cautious and conscientious work.

在中年的时候踏踏实实做人，兢兢业业做事。

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There are also images of him as he approached middle age in the 1990's a time he gained the blessing of no less a moral authority than Nobel laureate Nelson Mandela.

VOA: standard.2009.08.29

This is one of the reasons why in the golden age of Arabic scholarship in the Middle Ages, there was so much dispute about the Poetics.

这就是为什么在,中世纪阿拉伯学术界的鼎盛时期，关于诗学有这么多争议。

耶鲁公开课 - 文学理论导论课程节选

Research shows that being overweight or obese in middle age can double your risk of dementia.

CNN: How does nutrition affect dementia?

Emotional behaviour in childhood may be linked with heart disease in middle age, especially in women, research suggests.

BBC: Unhappy childhood linked to heart risk in later life

Now we know we need to do more for those in middle age.

CNN: Why more Americans are dying of suicide