The study focused on France, Italy, Spain, the Netherlands, Greece, Germany, Denmark and the UK.

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。

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The study focused on people born at the beginning of the 20th century, using death certificates and census data.

研究者们使用死亡证明和人口普查数据作为参考资料，主要对象是20世纪初出生的人。

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The study focused on those uncomfortable movie-viewing moments and how viewers acted during the movie and after it.

这个研究侧重于那些让人不悦的画面，及观影者在观影中和观影后的反应。

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The study focused on 48 4-6 year olds who were divided into two groups.

FORBES: Music Training Improves Verbal Intelligence in Children

The study focused on head scans since the brain is believed to have heightened sensitivity to radiation.

WSJ: Childhood CT Scans Pose Cancer Risk

He added that the study focused on historical data in order to strengthen confidence in the existing projections.

BBC: Climate shifts 'hit global wheat yields'