There are various potato dishes:stewed potatoes and beef, diced/sliced potatoes, potato soup, potato and pork, potato cake, mashed potato, hash browns, fench fries, gnocchi, baked potato, …etc.
有各种不同的土豆菜肴：红烧土豆和牛肉，切块/切片土豆，土豆汤，土豆和猪肉，土豆饼，土豆泥，薯饼，薯条，土豆团，烤土豆，…等等。
Imagine that there are two goods in the world-meat and potatoes. And there are two people in the world - cattle rancher and a potato farmer - each of whom would like to eat both meat and potatoes.
试想一下，如果世界上只有两项货物-肉和土豆，两个人-一个牧场主和一个种土豆的农夫，并且这两个人都既喜欢吃肉，又喜欢吃土豆。
Imagine that there are two goods in the world-meat and potatoes. And there are two people in the world - cattle rancher and a potato farmer - each of whom would like to eat both meat and potatoes.
试想一下，如果世界上只有两项货物-肉和土豆，两个人-一个牧场主和一个种土豆的农夫，并且这两个人都既喜欢吃肉，又喜欢吃土豆。
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