This interpretive framework, which once dominated antislavery historiography, had been discounted by historians for two basic reasons.

这种解释框架曾主导过反奴隶制的史学，但由于两个基本原因，它已被历史学家所忽视。

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Is not really harmonious society caused by basic reasons.

更是造成社会不能真正和谐的基本原因。

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There are two basic reasons - safety and improved performance.

有两个基本原因-安全和更好的性能。

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There are two basic reasons why exporters turn to a federal agency for financial assistance.

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They do for very basic reasons that the authors lay out in eye-opening fashion.

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But there are even more basic reasons why the much-vaunted relationship is not what it was.

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