Descriptors might represent a connection to a device, pipe, or a socket for communicating with another process or to a normal file.
描述符可以表示到设备、管道或套接字的连接，这些连接用于与另一个进程或普通文件进行通信。
2
In normal HTTP communication, the client always initiates the data transfer by opening a connection to the server and sending a request.
在普通HTTP通信中，客户端始终通过打开到服务器的连接并发送请求来发起数据传输。
3
Assuming you have a database of choice, you will create a connection as normal, and generate a page displaying the XML laid out in a user readable fashion.