One drink equals a bottle or can of beer, a medium glass of wine or a very small glass of liquor.

VOA: special.2009.09.08

So leaving aside the specific example of beer, you think about some product that has some dimension on which it varies, and we can use this model to see how competition is going to work in that market.

把啤酒的例子放在一边,你们自己想一些在某种程度上,有所不同的产品,我们使用这个模型来研究,这个市场的竞争是怎样的

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