A resource URI element that identifies the cascading style sheet that is used to display the custom widget.

一个资源uri元素，标识用于显示自定义小部件的层叠样式表。

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I used the Firebug extension to view the Cascading style Sheet (CSS) styles of the existing registration form fields to make sure my custom fields had the same CSS style class.

我用这个Firebug扩展来查看现有注册表单字段的CSS (Cascading Style Sheet)样式，以确保我的定制字段具有相同的css样式类。

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