Quantitative structure activity relationship (QSAR) plays an obvious role in the study and use of toxicology.

定量构效关系在毒理学的研究和实践中发挥着重要的作用。

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Therefore, the researches on structure-activity relationship and dose-effect relationship should be undertaken for its proper utilization in pharmacognosy.

因此，有必要进一步加强研究山豆根的药物构效关系和量效关系，使山豆根得到更加充分的开发和利用。

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Usually quantum chemical calculation is an important way to get structural parameters of specific molecules in study of the structure-activity relationship of organic pollutants.

在有机污染物的结构活性关系研究中，量子化学计算是获得分子结构参数的重要途径。

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Just what percentage of Wall Street activity has any relationship to those goals?

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It is important to know where the rooms are in relationship to the football activity center -- (laughter) -- which is good.

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