一个长句的句型结构

A long-hold view of the history of the English colonies that became the United States has been that England's policy towards these colonies before 1763 was dictated by commercial interests and that a change to a more imperial policy,dominated by expansionist militarist objective,generated the tensions that ultimately led to the Amercian Revolution.

请帮我划分一下句型结构，长句有些晦涩难懂

这是段翻译器翻译的乱句，完全没有语法，你给我中文，我给你翻译

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