All of these changes will add a new layer of structure and style to your pages, bringing them closer to being fully usable in your application.
所有这些变化，都会给页面添加新的结构层和样式，使它们更加可用于应用程序中。
To guide the waves, an extra layer of structure is required.
我们需要额外的结构层来引导这些波。
To guide the waves, an extra layer of structure is required.
我们需要额外的结构层来引导这些波。
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