A new column indicates the last modification date.

一个新列会指示最后的编辑日期。

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A preview now shows three columns with subject, number, and last modification date.

预览现在显示三列，它们是主题、数量和最后一次修改日期。

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Most sitemap creators are web-based, and they request the URL of the website along with a few parameters such as change frequency and last modification date.

大多数站点地图创建器是基于web的，它们利用一些参数(比如说更改频率和最新修改日期)请求web站点的URL。

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