双语例句原声例句
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Irving Fisher also drew on the curve, a production possibility frontier for society, which he made downward-curved.
欧文·费雪还画了一条曲线，一条社会的生产可能性边界，他让它向下弯曲。
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Irving Fisher also drew on the curve a production possibility frontier for society, which he made downward-curved.
欧文·费雪还画了一条曲线，代表了社会的生产可能性边界P PF，这是一条向下的曲线。
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Irving Fisher also drew on the curve a production possibility frontier for society, which he made downward-curved.
欧文·费雪还画了一条曲线,代表了社会的生产可能性边界PPF,这是一条向下的曲线
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