Well, the reason, the way that we can check it is just to see if it's in between our two extreme 1 cases. We know that it has to be more than 1, because even if we had total shielding, 1 we would at least feel is the effective of 1.

好的我们可以检查它的原因和方式是观察,它是否在我们的两种极端案例之间,我们知道它必须大于，因为即使如果我们有完全的屏蔽，我们最小感到的有效值是。

麻省理工公开课 - 化学原理课程节选

Well, for our purposes, both are correct and we'll know how to figure this out on tests.

这个,对课堂而言,两种都正确,我们会在测试中明白原因的

耶鲁公开课 - 聆听音乐课程节选

That's why you need two kinds of immune responses.

这就是你需要两种免疫反应的原因

耶鲁公开课 - 生物医学工程探索课程节选

The reason is because there are two different approaches to deal with illness: one,the positive psychological approach is that the illness is the absence of health, as opposed to health is the absence of illness.

究其原因，是因为有两种不同的方法,对付疾病，一是积极心理学方法,它指的是，疾病相当于不健康，相对地，健康等于没疾病。

哈佛公开课 - 幸福课课程节选