粒状多晶硅是一个非常有用的生产因素。

Granular polysilicon is a very useful form factor.

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进入知识经济时代，“知识”取代土地、劳动、资本等成为最重要的生产因素，知识已经成为企业竞争优势的源泉。

With entering into the time of knowledge economy, "knowledge" replaces land, labor, capital and becomes the most important production factor and the source of competitive advantage.

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并在生产因素保持相对稳定的条件下，据此模型对河北省棉花生产进行规划性预测，为生产的规划与决策提供科学信息。

The model was used to predict the cotton yield in Hebei province under the conditions of relative stability and to provide scientific information for production planning and decision making.

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