This type of study design, known as "case-control," cannot prove cause-and-effect.

这种类型的研究被称为病例对照研究，它不能够证明两者之间的因果关系。

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This type of study design, known as "case-control," cannot prove cause-and-effect.

这种类型的研究被称为病例对照研究，它不能够证明两者之间的因果关系。

youdao