变速杆球，滚轮胎，耦合元素；

Shift lever balls; Roller tires; Coupling elements;

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在AOP编程中使用元数据将类与方面之间的耦合限制为附加在程序元素上的元数据。

Using metadata in AOP programming limits the coupling between classes and aspects only to the metadata attached to the program elements.

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当模式变得高度耦合时，元素和类型就变得相互依赖，使得难以管理未来的更改和添加。

When schemas become highly coupled, elements and types become interdependent, making it difficult to manage future changes and additions.

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