Now the difference between the two models, the health model and the disease model is more than just semantic.

两种模型，健康模型和疾病模型的差异,不仅仅是语义上的。

哈佛公开课 - 幸福课课程节选

The way we're going to model differentiated products is to imagine, just to take a simple example, imagine a city and this city has one long straight road through it.

我们建立差异产品模型的方法,想象一下,举个简单的例子,想象一个被一条直路贯穿的城市

耶鲁公开课 - 博弈论课程节选