再一次，您要定义相同的项：主机名、服务名等等。

Again, you define the same items: the hostname, service name, and so forth. The syntax is different, but the results are the same.

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这一行通知代理服务器将代理请求上的主机名设置为代理服务器上的主机名。

This line informs the proxy server to set the host name on the proxy request to that of the proxy server.

youdao

指定您的主机连接信息，包括服务器名、网络协议、主机名、服务和端口。

Specify your host connection information, including server name, network protocol, host name, service, and port.

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