Of course, normal CSS selector rules apply, and you can exploit them to apply different styles to the same widget type depending on its context.

当然，普通的 CSS 选择器规则也可以应用，所以可以根据小部件的上下文，用选择器规则在同一小部件上应用不同的样式。

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Of course, playing with this expanded form allows programming arbitrary calculations inside an XPath-like selector — anything you can write in Scheme.

当然，用这种展开的形式允许在类XPath选择器中编程完成任何计算——您能够用Scheme编写的任何东西。

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