market forces
noun [ plural ] uk/ˌmɑː.kɪt ˈfɔː.sɪz/ us/ˌmɑːr.kɪt ˈfɔːr.sɪz/
市场力量
the forces that decide price levels in an economy or trading system whose activities are not influenced or limited by government
The action of market forces means that the cost of something rises if demand for it rises and the amount available remains constant. 市场力量的作用表现为在商品数量不变的情况下，需求增加则价格上升。