Participants were balanced across the three groups for age, sex, educational back-ground, severity and duration of depression, and use of antidepressants.
这三组参与者在年龄、性别、教育背景、抑郁症的严重程度和持续时间以及抗抑郁药物的使用上保持平衡。
2
In older agegroups women predominate because men tend to die younger.
在年龄较大的人群中,女性占多数,因为男性的寿命倾向于短些。
《柯林斯英汉双解大词典》
3
There will be winners in each of three agegroups, and one overall winner.