这种语言具有一种经过良好设计的可扩展机制，并且其声明式处理模型支持可维护和可重用代码。
It has a well-designed extensibility mechanism, and its declarative processing model allows for maintainable and reusable code.
如本文示例所示，W3C XML schema语言的设计者们在创建这个标准时考虑了可扩展性。
As you can see from the examples in this article, the designers of the W3C XML Schema language had extensibility in mind when they created the standard.
因此，样式表语言表达必须是可扩展性和响应性设计。
So, style sheet languages must express designs that are scalable and responsive.
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