在同等条件下，当某物品的价格上升时，对该物品的需求减少。
The law of demand states that, other things equal, the quantity demanded of a good falls when the prices of the good rises.
波动某物(价格)从某一位置或水平到另一位置或水平的活动。
Fluctuation the movement of something (price) from one position or level to another.
波动某物(价格)从某一位置或水平到另一位置或水平的活动。
FluctuationThe movement of something (price) from one position or level to another.
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