Association: An association element represents the relationship between two end classes.

关联：一个关联元素代表了两个端点类间的关系。

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An association between two elements can be shown either as an attribute in the class or as an association to the related element.

两个元素之间的关联要么显示为这个类中的一个属性，要么显示为这个相关元素的一个结合。

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Support for Association as a cell element type in matrices.

对组织作为矩阵中一个基本元素类型的支持。

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