于是就要引入价格机制以及市场调节，来调节对稀缺资源的竞争。
So a price mechanism and market is needed to mediate the competition for a scarce resource.
在价格机制下如未能捕获外部性，市场不再是资源的最优配置方式。
Markets become less-than-optimal allocators of resources when they fail to capture externalities in market prices.
价格作为一种网络拥塞控制管理与资源分配的机制不断地表现出较高的效率。
Pricing has showed great efficiency as a mechanism for Internet congestion control management and Internet resource allocation.
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