研究表明，智能手机目前是美国青少年的主要社交形式。
Research has shown that smartphones are currently American teens' main form of social communication.
这项研究探讨了为什么大多数青少年会近视。
According to the study, why are most teenagers short sighted?
研究表明推迟教学日上课时间使青少年获益良多。
数据来自美国青少年健康长期研究所。
The data come from the National Longitudinal Study of Adolescent Health.
不过，研究发现，两代青少年的平均成绩却相似。
But average achievement was found to be similar in teenagers from both generations.
他的研究成果刊登在网络版《青少年期刊》上。
His findings are published online in the Journal of Youth and Adolescence.
他领导了青少年方面的研究。
研究结果还可能解释为何许多青少年比较情绪化。
The findings may also explain why so many teenagers are moody.
他是研究青少年犯罪的专家。
目的：研究青少年对自我形象的感受和态度。
Objective to study the sensation and attitude of juvenile in adolescence to the body image.
这项研究成果被发表在了《青少年健康》杂志上。
The study appears online in the Journal of Adolescent Health.
前言：目的：研究青少年第三磨牙发育程度及萌出方向。
Objective: To study the erupt direction and development of the third molars of the adolescents.
研究者通过在诊所内测量及用一个可移动的监测装置来测量这些青少年的血压。
They had their blood pressure taken at the clinic and via an ambulatory monitoring system.
研究人员称，五分之一的青少年遭受头痛之苦至少一星期一次。
One in five young teenagers suffer headaches at least once a week, say researchers.
研究：青少年睡觉充足不易患抑郁。
研究：青少年睡觉充足不易患抑郁。
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