以往有关权力权利关系理论范畴的研究重点是何者为本源以及二者之间的目的与手段关系。

The emphasis of traditional study on the theory scope of the relationship between power and right lies on which is the origin and the relationship between them is aim and method.

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工具性关系在次级群体中占主导地位；我们把人当作达成目的的手段，而不是目的本身。

Instrumental ties predominate in secondary groups; we perceive people as means to ends rather than as ends in their own right.

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但难相处的母亲经常使用这种手段，并设立强制性的母子关系。

But it's the routine use of such behaviors that distinguishes difficult mothers and sets up a coercive relationship.

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They use food frequency questionnaires, which I mentioned before, surveys, and then biological markers like blood tests of certain things to see how diet is related to health.

研究员还运用食物频率调查表,我之前曾提到过,各类调查以及生物标志物,像是血液检测等手段,来研究饮食与健康之间的关系

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选