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。

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

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层叠样式表给程序员更简单，高效的方式去设计一个网页，它能综合像颜色，圆角边缘，渐变和动画等设计元素让页面看起来更漂亮。

CSS gives programmers aneasy, efficient way to define a web page's layout and beautify the page withdesign elements like colors, rounded corners, gradients, and animation.

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在本例中，一个包含有一些层叠样式表(Cascading Style Sheet, CSS)语法的字符串被传递给函数，然后jQuery尽可能高效地把这些元素找出来。

In this example, the function is passed a string containing some Cascading Style Sheets (CSS) syntax, and jQuery finds the elements as efficiently as possible.

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