这些函数以环境句柄、连接句柄、语句句柄或描述符句柄作为输入参数，返回与上一次使用该句柄作出的函数调用相关的诊断信息。

These functions take environment, connection, statement, or descriptor handles as input and return the diagnostic information related to the last function call made using that handle.

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Screen 代理仍然存在，它控制的所有窗口也还存在，但是与 Screen 的连接临时切断了，这会让用户返回到远程登录 shell。

The Screen proxy persists, as do all windows it controls, but the connection to Screen is temporarily severed, returning you to the prompt of your remote login shell.

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浏览器利用返回的IP地址与Web服务器的端口80构成一个TCP连接。

The browser makes a TCP connection to port 80 on the Web server with the returned IP address.

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