To illustrate some event handling techniques, suppose we wish to have a single page rendered in several different styles based on user input.
为了研究一些事件处理技术，假定我们希望让一个网页由用户输入的来决定不同的渲染样式。
To illustrate some event handling techniques, suppose we wish to have a single page rendered in several different styles based on user input.
为了研究一些事件处理技术，假定我们希望让一个网页由用户输入的来决定不同的渲染样式。
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