derive demand

基本解释

But external factors have helped, too. In particular, a European Union directive requires Britain to derive 15% of its energy demand from renewables by 2020.
其中同样也有外部作用，尤其是欧盟促进可再生能源使用指令，其要求到2020年，英国必须有15%的电力来源于可再生能源。
In section three I introduce and study the related models of information retrieval and derive more applicable model expressing user demand and receive required information.
第三部分重点介绍相关的信息检索模型，并对其进行比较研究，从而得出更适合用户表达检索需求和用户获得所需信息的检索模型。
The building of model of pressure-load character of main-pipe system is helpful to derive the calculation formula of main-pipe total steam load demand.
母管系统压力负荷特性模型的建立有助于推导母管蒸汽总负荷需求的计算公式。

Corporations, especially multi-nationals that derive much of their business overseas, are facing slowing demand because of the weakening global economy, weighing on profit margins.
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