A 503 Service Unavailable Error happens when a web server is temporarily unable to handle a request that’s been made of it. Almost always, the error is on the website itself and there’s nothing you can do about it but try again later. Still, there are a few quick things you can try on your end.

当Web服务器暂时无法处理对其发出的请求时，会发生503服务不可用错误。 该错误几乎总是在网站本身上，您无能为力，但是请稍后再试。 不过，您可以尝试一些快速操作。

A 503 Service Unavailable Error indicates that a web server is temporarily unable to handle a request. That could be the web server you’re trying to access directly, or another server that web server is in turn trying to access. It’s called a 503 error because that’s the HTTP status code that the web server uses to define that kind of error. The error can occur for a number of reasons, but the two most common reasons are that the server is overwhelmed with requests or is having maintenance performed on it.

503服务不可用错误表示网络服务器暂时无法处理请求。 可能是您尝试直接访问的Web服务器，或者是该Web服务器又尝试访问的另一台服务器。 之所以称为503错误，是因为Web服务器用来定义这种错误的HTTP状态代码。 发生此错误的原因有很多，但最常见的两个原因是服务器不堪重负或对其进行了维护。

The 503 error is different from a 500 Internal Server Error. The 500 error occurs when something is preventing the server from handling your request, while the 503 Error actually means that the server is fine—it’s able to process your request and is returning the 503 error by design.

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