我们自小就是朋友，因为我们两家彼此很要好。

We have been friends since we were little kids because our family is friendly with each other.

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我们两家共用一道围墙。

Our houses share a common fence.

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我们两家的房子相毗连。

Our two houses adjoin.

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So even though there's only two firms here, with price competition, identical products, we end up with an outcome that looks exactly like perfect competition, except for the fact there's only two firms.

尽管这里只有两家公司,进行某种产品的价格竞争,我们得到了,和完全竞争非常相似的结果,除了只有两家公司这个事实

耶鲁公开课 - 博弈论课程节选

The point is that in this game in which firms competed in prices, even though there were only two firms in the market, only one firm more than monopoly, we get a dramatically different result than we had last time.

重点是这个公司进行价格竞争的博弈,尽管博弈中只有两家公司,仅仅比垄断情况下多了一家,我们得到了与上次完全不同的结果

耶鲁公开课 - 博弈论课程节选

You could think of these as two companies producing bottled water and now we're going to get hundreds of letters saying not all bottled waters are the same, especially from Italians and the French, but never mind. Let's just pretend that they are.

把他们想象成两家瓶装水厂商吧,我估计我们会收到数百封信件,告诉我说不是所有瓶装水都是一样的,尤其是从意大利和法国寄过来的那些,无所谓了,就把它们想象成是同质的吧

耶鲁公开课 - 博弈论课程节选