The authors acknowedge that the findings don't necessarily apply to all families, since they only studied a few hundred families in a limited geographic area.
作者们承认这个发现并不对所有家庭都适用，因为他们仅仅研究了一个有限地理区域内的数百个家庭。
The authors acknowedge that the findings don't necessarily apply to all families, since they only studied a few hundred families in a limited geographic area.
作者们承认这个发现并不对所有家庭都适用，因为他们仅仅研究了一个有限地理区域内的数百个家庭。
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