名词
中文翻译：需求理论
同义词：
['needs theory', 'supply-demand theory']
例句：
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1.The demand theory suggests that the price of a good will increase when more people want to buy it.
需求理论表明，当更多人想要购买时，一种商品的价格会上涨。
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2.This new demand theory could help us understand why consumers are willing to pay more for certain products.
这个新的需求理论可以帮助我们理解为什么消费者愿意为某些产品支付更多。
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3. The government has implemented a demand theory to regulate the supply of goods and services.
政府实施了需求理论来调控商品和服务的供应。