Details Page: the title that will be added to the JSP representing the detail view of the class.

细节页：加到jsp上的标题代表类的细节视图。

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Notice, we added another space before the arrow to separate it from the post title when the page is generated for viewing.

注意，我们在箭头标记的前面添加了一个空格，当网页可以浏览的时候，箭头标记与文章标题便分开了。

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