In addition to the built-in alerts, custom alerts may be generated by subscribing to a list of error conditions or in conjunction with the logging system.

除了这些内置警报，还可以通过订阅错误条件列表或配合使用日志系统来生成定制警报。

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In addition, you may use an application server in conjunction with your web server.

另外，你也可能为你的服务器添加数据库和其他的功能。

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