Moving towards the bottom of transaction marginal point indicates that, the producers who lower the rational transaction producer level also can achieve win-win transaction with consumers.

交易临界点下移表明，低于原有合理临界生产水平的生产者也可以与消费者之间有双赢的交易。

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Your electric grid has only so many windmills attached, and its marginal producer is a coal-fired plant.

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At a 50% marginal tax rate, the producer can keep only half of any increased production.

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Or rather, to be more accurate, the marginal cost to the consumer closer to the marginal cost of production for the producer.

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