Also, there will be need to discuss the various factors determining prices in relation to change in quantity demanded and change in demand of personal computers.
此外，将需要讨论的各种因素决定价格的变化在数量上的需求和变化的个人电脑的需求。
Of course, a rise in the spot price of oil triggered by a change in expectations about future prices will cause a decline in the current quantity of oil that consumers demand.
当然，由未来油价预期引发的现货油价上涨会促使当前石油需求量下降。
Effective demand will not change in exact proportion to the quantity of money.
有效需求和货币数量不作同比例地变动。
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