In that case the marginal rate of substitution need not equal the ratio of the prices.
在那种情况下,边际替代率不必等于价格比率。
The consumer chooses consumption of the two goods so that the marginal rate of substitution equals the relative price.
消费者选择两种商品的消费以便边际替代率等于相对价格。
The marginal rate of substitution of goods and the existence theorem of the optimal solution is to introduce some of the previous extension of the theory.
商品的边际替代率和最优解存在定理的介绍则是对前面理论部分的延伸。
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