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。
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。
Irving Fisher also drew on the curve a production possibility frontier for society, which he made downward-curved.
而如果行业的要素供给曲线是正斜率的话，所有厂商就不可能在价格不变的情况下同时得到更多的生产要素。
But if factor supply curves to the industry slope positively, all firms together cannot get an increased quantity of factors of production at an unchanged price.
以生产可能性曲线与收入预算线为工具，分析农户达到生产者均衡状态的必要条件。
With the tools of production possibility curve and budget line, the paper analyzes the necessary factors of the producer equilibrium state realized by rural household.
从问题1的生产可能性曲线图，解释经济学的稀缺性，选择和增加机会成本的概念。
With reference to the production possibility curve diagram you drew for Question 1B, explain the Economics concepts of scarcity, choice and increasing opportunity costs.
从问题1的生产可能性曲线图，解释经济学的稀缺性，选择和增加机会成本的概念。
With reference to the production possibility curve diagram you drew for Question 1B, explain the Economics concepts of scarcity, choice and increasing opportunity costs.
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