The most important lesson we can learn from the supply and demand model is that with increased demand comes increased price competition.
从供需模型，我们能学到的最重要一课就是需求的增长必然导致价格的竞争。
Using system engineering theory and method, system model and simulation method, the paper analyses the conflict between supply and demand of water resources within the system.
文章用系统工程的理论和方法，用系统模型和模拟的方法，分析系统内水资源的供给与需求。
The theory of supply and demand, Sraffa's model and the labor theory of value are the three kinds of price theories.
供求决定论、斯拉法模型和劳动价值论是三类价格决定理论。
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