要考虑的因素例如，物料变化、产品历史、产品转移自哪里。

Examples for points to be taken into consideration are variability ofmaterials, product history, where the product is being transferred from.

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它也意味着基于改动效果，产品历史和早期测试结果而更改我们的测试覆盖率。

It also means modifying our coverage based on the impact of the change, the history of the product, and the previous test results.

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以河北矾山磷矿产品历史销量为时间序列，利用灰色预测理论，构建其主要产品市场需求预测模型，并对企业2004年主要产品销量进行预测。

A market demand estimation model of enterprise product is set by applying Gray theories. The estimation of sales volume of main products in 2004 of Fanshan Phosphate Mine is made by using the model.

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Now think of another product in American history that doubled every decade for four decades, and then imagine that that product became the country's, without question, absolute largest export.

思考下在美国历史中有没有另一种产品曾,有如此辉煌的成就,那么这个产品将毫无疑问地,成为美国最大的出口产品

耶鲁公开课 - 美国内战与重建课程节选