价格规律，在一定或特定的时间内，某一商品或某类商品，所表现出来的价格波动，是由商品价值决定，受市场供求关系影响围绕价值上下波动。
举出单一价格规律可能成立的三种物品，和单一价格规律不成立的三种物品。
List three goods for which the law of one price is likely to hold, and three goods for which it is not.
相对于经营者而言，准确把握职业足球门票价格规律并由此制定合适的门票价格是进行职业足球竞赛产品营销的关键。
To the business managers, mastering the laws of the ticket price and making suitable price is very important to that sale of the product.
弄清减价规律，砍家就知道什么时候去查证他们已购物品的价格。
By knowing the store policy, the haggler knows when to return to check the price of something they already bought.
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