International trade in potatoes currently represents only about six percent of production, so prices are set locally.

当前，国际贸易交易的土豆仅占土豆产量的6%，因此土豆价格由各个地方自行制定。

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That is, without trade, Figure 3-1 shows the possible combinations of meat and potatoes that the farmer and rancher can each consume.

既在不交易的情况下，图3 - 1展示了农夫和牧场主可以消耗的土豆和牛肉的可能组合。

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The gains from trade are most obvious if the rancher can produce only meat and the farmer can produce only potatoes.

交易所带来的好处在当牧场主只能生产肉类、农夫只能种土豆的情况下是最为明显的。

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