调查的代表性数据涉及全美10,000个以上13 ~ 18岁的青少年。
It involved nationally representative data on more than 10,000 teens aged 13 to 18.
调查的代表性数据涉及全美10,000个以上13 ~ 18岁的青少年。
It involved nationally representative data on more than 10, 000 teens aged 13 to 18.
这项研究是在密歇根大学健康和退休试验研究项目的国家代表性数据的基础上进行的。
The research was based on nationally representative data from the University of Michigan Health and Retirement Study.
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