看到页面中心只有一个黑点，同学们很困惑。

Students were confused to see that there was just a black dot in the center of the page.

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从页面中心开始。

Start in the center of a page.

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页面中心区域通常由列表或受限列表组件构成，提供各种方法排序或显示数据记录。

The central area of the page is usually composed with a list or constrained list component, offering a variety of methods of sorting or displaying the list of data records.

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