过度供给可以多种形式存在。
Oversupply can take many forms.
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首先，它是必要的控制过度的需求，而且也是为了确保有效供给。
First, it is necessary to control excessive demand, but also to ensure the effective supply.
市场供给过度会冲击价格。
Flooding the market should bring down prices.
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