• In some age cohorts, there are 20 million more males than females.

    因为重男轻女现象的存在,很多女婴没有出生就被流产了。

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  • A series of ecologic analyses of pertussis notifications during epidemic periods in relevant age cohorts were conducted.

    文章相关年龄组流行阶段百日咳呈报案例进行了系列生态学分析

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  • There was an even distribution of fractures across the age cohorts, and most fractures were sustained from a high-energy transfer mechanism.

    这里同龄病人骨折评价分布情况常见的致伤原因高能量传递机制。

    youdao

  • There was an even distribution of fractures across the age cohorts, and most fractures were sustained from a high-energy transfer mechanism.

    这里同龄病人骨折评价分布情况常见的致伤原因高能量传递机制。

    youdao

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