Check the documentation for Rails 3 before you continue, as the specifics may change from release to release.

在您继续进行之前请查看Rails 3文档，因为根据版本的不同具体的操作会有所不同。

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You should be able to launch your Rails application and connect to it over the public IP address of the application server. If you get an error, check the following.

您可以启动您的Rails应用程序，通过应用程序服务器的公共ip地址连接它。

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Check the Rails documentation for details.

查阅Rails文档以获得更详细的信息。

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In addition, the railroad does biannual machine inspections of all its rails using equipment that check for proper rail geometry such as the level or curvature on a given set of tracks.

WSJ: Metro-North Is Set To Restore Full Service Wednesday

The railroad also employs ultrasound to check for early signs of flaws within the steel rails.

WSJ: Metro-North Is Set To Restore Full Service Wednesday