商品或服务或多或少地有价值是因为它们的生产数量和人们需要量之间的关系。
Commodities or services are more orless valuable because there are more or less of them relative to the amountspeople want.
同时，劳动生产率变化还会使商品供求关系变化，从而使价值总量发生变化。
The change of labor productivity also can cause the change of the commodity supply and demand relations thus the total value quantity is changed.
在马克思的思想体系中，资本不是生产要素，也不创造价值，而是反映商品经济的一种社会生产关系。
But according to Marxist theory, as capital itself does not create value, it is not regarded as a production factor, but a reflection of social production relationship in market economy.
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