这项研究主要关注法国，意大利，西班牙，荷兰，希腊，德国，丹麦和英国。
The study focused on France, Italy, Spain, the Netherlands, Greece, Germany, Denmark and the UK.
这份发表在Addiction周刊上的研究报告对来自英国、爱尔兰、意大利、德国和荷兰的近4000名青少年进行了调查。
The report, which is published in the journal Addiction, involved nearly 4, 000 teenagers in England, Ireland, Italy, Germany and the Netherlands.
这份发表在Addiction周刊上的研究报告对来自英国、爱尔兰、意大利、德国和荷兰的近4000名青少年进行了调查。
The report, which is published in the journal Addiction, involved nearly 4, 000 teenagers in England, Ireland, Italy, Germany and the Netherlands.
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