It has been frequently assumed, but not proved, that the majority of the migrants in what has come to be called the Great Migration came from rural areas and were motivated by two concurrent factors.

人们常常假设，但没有证据证明，在所谓的“大迁移”中，大多数移民来自农村地区，这是由两个同时发生的因素推动的。

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While the researchers assumed that the well-structured daily plans would be most effective when it came to the execution of tasks, they were wrong: the detailed daily plans demotivated students.

虽然研究人员认为，当涉及到执行任务时，规划很好的日常计划是最有效的，但他们错了，详细的日常计划会让学生失去动力。

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Here, it is assumed (and, indeed, it must be the case) that the file does exist.

此处假设(实际上必须这样)该文件已经存在。

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No doubt all of the above is potentially true, but can it be assumed that better knowledge of calculus or any subject taught in school will advance us economically?

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Lead author Dr Emma Halliwell, social psychologist at the University of the West of England's Centre for Appearance Research, said that while it might be assumed that boys will react similarly to girls when faced with this sort of peer pressure, it was important to show it scientifically.

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The Americans have not weighed in on the issue and so it can be assumed that they, too, support it.

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