为什么说自由贸易可以使大家普遍受益呢？

Why is free trade said to be universally beneficial?

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美国出口大豆、半导体和采矿机械等产品的企业，过去10年普遍受益于美元的贬值。

U. S. exporters of such things as soybeans, semiconductors and mining machinery generally have enjoyed the descent of the dollar over the past decade.

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为什么说自由贸易可以使大家普遍受益呢？这可以在所谓“相对优势”的理论中找到答案。

Why is free trade said to be universally beneficial? The answer is a doctrine called "comparative advantage".

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