It's known as the law of supply and demand.
这就是供求法则。
Prices are regulated by the law of supply and demand in a free market.
解放市场的物价由供求干系规律来调理。
Use the law of supply and demand to your advantage.
用法律的供应和需求，以您的优势。
Prices are regulated by the law of supply and demand in a free market.
自由市场的物价由供求关系规律来调节。
The market only obeys the law of supply and demand.
市场只遵循供需的规律。
The market only obeys the law of supply and demand.
市场只遵循供需的规律。
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