您可以选择性地为每个URL列出额外的信息，包括URL的最后修改时间、更改频率、终止日期和优先值。

Optionally, you can list additional information for each URL, including its last modification date, its change frequency, an expiration date, and a priority value.

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如果某个进程或者内核修改了该分页，那么该分页的状态将更改为已修改的。

If a process or the kernel modifies the page, the state of the page changes to modified.

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修改公司简介，更改公司主题。

Modify the company profile and change company themes.

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