The remote server returned an error: (503)

The remote server returned an error: (503)

The remote server returned an error: (503) Server Unavailable. 的意思是远程服务器返回错误：（503）服务器不可用。

例句
1.Specify the Remote server IP address, port and URI of the application service.
指定应用程序服务的远程服务器IP地址、端口和URI。
2.It will pass all of the data from the remote server to that function.
它将来自远程服务器的所有数据传递给该函数。
3.DB2 Universal Database assumes that the pass-through session includes some'write'operations against the remote server.
DB2Universal Database假设pass-through会话包括一些对远程服务器的“write”操作。
4.You would need to use this if you are posting data to the remote server.
向远程服务器发送数据时需要用到。
5.It continues executing until it receives an asynchronous callback from the remote server.
它继续执行，直到从远程服务器收到异步回调。