The main assumption is that the amount of buyer′s purchase is inversely proportional to the instant price and is directly proportional to the instant rise rate of prices.
买家的买入量与即时的价位成反比，与即时的价位上升率成正比。
The main assumption is that the amount of buyer′s purchase is inversely proportional to the instant price and is directly proportional to the instant rise rate of prices.
买家的买入量与即时的价位成反比，与即时的价位上升率成正比。
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