需求、供给和均衡价格 Demand Supply & Equilibrium Price
从图形上看，均衡价格是供给曲线和需求曲线相交时的价格。
On a graph, it is the price at which the supply and demand curves intersect.
价格波动是为了使供给和需求实现均衡。
Prices fluctuate in order to bring supply and demand into equilibrium.
本文研究了如何提出合理的预期价格，保证供给和需求趋于均衡，从而实现价格波动的可控性。
In present paper we show how the demand and supply can tend towards equilibrium by means of suit-able expecting price, and then the controllability of price changes can be acquired.
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