It points out particularly the error about a method of calculation of the elasticity of a unit demand.

指出，单位需求弹性的一种计算方法的误解。

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At night, when demand is lower, these power stations can be switched off, which means that each unit of electricity has a lower carbon footprint.

到了晚上，需求降低，这些发电站就会关闭。这意味着产生每单位电能所带来的碳足迹降低了。

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When an employing unit recruits persons via a job intermediary, it shall provide the intermediary with truthful information about its demand for jobs.

用人单位通过职业中介机构招用人员，应当如实向职业中介机构提供岗位需求信息。

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Figure 2 shows unit demand growth and contraction trends for various HDD applications from 2008 projected through 2012.

FORBES: A Pause Before Future HDD Growth?

One WindTamer customer is the U.S. Army, which purchased last year a mobile trailer-mounted turbine and renewable energy storage unit containing the Power on Demand system that the military would be able to move around even in battle zones.

FORBES: Power Opportunity for GE, et al: How To Store Wind/Solar Renewable Energy

Weakness in the performance chemical unit had to do with weak market demand across the globe.

FORBES: DuPont And A Hungry World Offset Chemicals Weakness; Dividend Hiked, Outlook Reaffirmed