Omit sidebars when serving a "404 Page not found," which saves CPU cycles and bandwidth.
当出现“404Page not found”时，忽略侧栏，这可以节省CPU时间和带宽。
When the target site shows a "Page not found" error, the visitor will likely click the "Back" button.
一旦目标网站显示出一个“页面找不到”的错误，访客很可能会点击“返回”按钮。
This section covers steps for diagnosing and resolving issues related to the Web server, Web server plug-ins, and Page Not Found errors.
本节讨论与Web服务器、Web服务器插件和Page Not Found错误相关的问题的诊断和解决步骤。
As a result, if someone comes across an error (for example, a 404 page Not Found, 403 Forbidden, or 500 Internal Server error), he will only see an ugly error code page.
因此，如果某人遇到一个错误(例如，404Page Not Found、403 Forbidden或500InternalServerError等错误)，他将看到一个难看的错误代码页面。
Everyone knows that if you try to access a page that doesn't exist, the server will throw you back 404 page not Found, or if you mess up your rails code, you will get a 500 Application Error.
每个人都知道如果打开一个并不存在的页面，服务器会返回一个404错误页面。如果你的Rails程序出错了，会返回一个500应用程序内部错误的页面。
Everyone knows that if you try to access a page that doesn't exist, the server will throw you back 404 page not Found, or if you mess up your rails code, you will get a 500 Application Error.
每个人都知道如果打开一个并不存在的页面，服务器会返回一个404错误页面。如果你的Rails程序出错了，会返回一个500应用程序内部错误的页面。
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