分类：用于给博文添加可供搜索的标签。比如，一篇关于动画Bugs Bunny的博文可能会被标上“疯狂的调调”、“Bugs Bunny”、“兔子”，以及“动画”这样的标签。

Categories: to tag blog posts with searchable tags; for example, a blog post about Bugs Bunny cartoons might have as tags "Looney Tunes", "Bugs Bunny", "rabbits", and "cartoon".

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添加新api的理由还包括代价，例如，开发者会拥有更多可供选择的概念。

The reason that adding new APIs also has cost, for example developers have more concepts to choose from.

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该产品目录被格式化为一个html表，带有可供用户添加商品到其购物车的控件。

This product catalog is formatted into an HTML table, with controls for the user to add each item to his or her shopping cart.

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