What this does, when you use relative risk you take some group of the population and you establish their risk as--at one.

当运用相对危险度这个概念时,要选定一个群组,并把这个群组的风险设为1

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

You'll see that concept of relative risk come up in subsequent classes.

以后的课上还会提到相对危险度这个概念

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Relative risk of death is an interesting concept from public health.

死亡相对危险度是个源于公共健康的概念

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选