middle age group 中年组
There were significant positive correlations between PAI-1 and WHR, TG, GSP, FINS and UA in the youth and middle-age group.
仅在青中年组与PAI-1表现相关性的指标是腰臀比（WHR）、甘油三酯（TG）、糖化血清蛋白（GSP）、血尿酸（UA）和FINS。
The offspring of the former group were more likely to have chronic diseases upon reaching middle age than their peers of the latter group [source: Kolata].
与同龄人或后一组人相比，前一组的后代在人到中年后更容易得慢性病。
In the Leeds study, young people were more likely to be Internet addicted than middle-aged users, with the average age of the addicted group standing at 21 years.
利兹大学的研究结果显示，年轻人比中年人更容易患上网瘾，上瘾人群的平均年纪在21岁左右。
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