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Many argue that the effects of e-commerce on supply chain management typify this process and will overturn accepted business models. But to understand the effect of e-commerce business, it is important to recognize that this is not the first time the supply chain has undergone a revolution. Changes at the turn of the 19th century formed the model for manufacturing and distribution throughout the 20th century. It is instructive to examine this revolution in more detail.

The main idea of the paragraph

Like other changes in history, e-commerce will overturn existing models and help form new models.

像历史上的其它变革一样，电子商务将颠覆现有的企业模式，帮助建立新的企业模式。

句子分析

But to understand the effect of e-commerce, it is important to recognize that this is not the first time the supply chain has undergone a revolution.

在此句中

　　1、it is important to recognize 是主句，动词不定式to recognize…作句中的实际主语，“it”是形式主语

　　2、动词不定式to understand the effect of e-commerce作目的状语

　　3、that this … a revolution是宾语从句，作“recognize”的宾语，其中的“the supply chain has undergone a revolution”作修饰“time”的定语从句。

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• Summary