During the evolution of delivery theories, there are three kinds of views: zero-delivery view, limited-delivery view and open-ended delivery view.

在制度变迁过程中有三种交割观点，即零交割观点、限制交割观点和无限制交割观点。

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During the evolution of delivery theories, there are three kinds of views: zero-delivery view, limited-delivery view and open-ended delivery view.

在制度变迁过程中有三种交割观点，即零交割观点、限制交割观点和无限制交割观点。

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