Resale and trade-in values for late-model vehicles in good condition have been rising all year as demand has outstripped supply, particularly for fuel-efficient models.

在需求大于供应的情况下，特别是对节能车型的需求，性能良好老款车的二手价格和抵价购物价格全年都有所提升。

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In its simplest models, prices elegantly balance supply and demand, magically directing individuals' pursuit of their own self-interest towards the greater good.

在其最简单的模型中，价格微秒地平衡了供求，把个人对于自身利益的追求魔术般地引向更大的好处。

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The supply and demand of traffic volume are discussed, some problems of transportation system and their mathematic models are studied.

阐述了交通运输需求与供给行为的理论，并研究了交通运输结构系统和数学模型。

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The 3D printing boom, among other trends, is leading to an explosion in the demand and supply of 3D models and data on the web.

FORBES: London-Based Startup 3D Industri.es Aims To Become The Google Of 3D Search

The most basic models of labor supply and demand would suggest that a bigger labor pool depresses wages, and indeed this is the argument taken up by many opponents of more open immigration policy.

FORBES: Guest post by Jordan Zachary Bell-Masterson

Recent declines in output in both Japan and Germany are largely due to inadequate demand caused by overly tight monetary policy, and not to supply-side constraints imposed by the failings of their models.

ECONOMIST: Glittering economic prizes