Irving Fisher also drew on the curve, a productionpossibility 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。
2
Irving Fisher also drew on the curve a productionpossibility 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。
3
With the tools of productionpossibilitycurve and budget line, the paper analyzes the necessary factors of the producer equilibrium state realized by rural household.