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。
Participants were balanced across the three groups for age, sex, educational back-ground, severity and duration of depression, and use of antidepressants.
就年龄、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这几点来说，这三组参与者都保持了平衡。
Participants were balanced across the three groups for age, sex, educational background, severity and duration of depression, and use of antidepressants.
一些研究表明，使用互联网使我们的注意力持续时间变短、记忆力变差。
Some studies show Internet use is making our attention last shorter and our memory worse.
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