商品价格涨落的最有说服力的解释就是供求。
The most persuasive explanation for the rises and falls of commodities is demand and supply.
中间商购买商品是为了再转售，对购货成本即中间商市场的价格变化较为敏感，其需求量随价格涨落的变化而变化。
For resales, resellers are sensitive to the cost, namely the price of reseller market, whose change will cause that of the demand.
提出了农用土地资源价格涨落机理，农用土地资源价格受以下因素的影响：地租量、贴现率、供求状况、通货膨胀率。
The price fluctuation mechanism of farming land resources. farming land resources are influenced by rental, discount rate, supply and demand condition, and inflation rate.
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