它可以包括一些属性，例如宽度、高度和背景颜色。

It can include a number of attributes, including width, height, and background color.

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一个样式可以有任意个属性：背景颜色、边框颜色、边框宽度、边框样式、字体颜色、字体集和字体大小。

A style can have any number of attributes: background color, border color, border width, border style, font color, font family, and font size.

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