The problem, though, is that these are population studies.
问题是这些仅仅是人口调查。
I would think that it's a problem without substantiation in large population studies.
没有大样本的人群研究结果作为支持，研究本身就会产生一些问题。
I would think that it's a problem without substantiation in large population studies.
没有大样本的人群研究结果作为支持，研究本身就会产生一些问题。
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