Objective to investigate the ultrasonographic features of polycystic ovary syndrome (PCOS) and to discuss the correlation and difference between PCOS and polycystic ovary morphology (PCOM).

目的探讨多囊卵巢综合征(PCOS)超声诊断特征，并对P COS和多囊卵巢形态(PCOM)的区别和联系加以讨论。

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Since there is a strong correlation between these variables and a country's wealth, they controlled for GNP per head by measuring whether it alone accounted for the difference in mating strategy.

由于这些指标与一个国家的财富密切相关，他们以人均国民生产总值为控制变量来看它是否能够单独解释择偶策略的差别。

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Ecker found there was a correlation between the severity of a person's autism and the amount of structural difference observed in their brain scans, compared with the control group.

艾克尔发现，与正常控制组相比，一个人自闭症症状的严重程度与大脑扫描中观察到的结构差异的多少存在相关性。

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The answer is, of course, no and the reason has to do with the difference between causation and correlation.

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They must know the difference between correlation and causality.

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