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。
Descriptors might represent a connection to a device, pipe, or a socket for communicating with another process or to a normal file.
进程会与它输入或输出频道文件的描述符(套接口)联系在一个端口号，IP地址，已知的捆绑的进程上，从而通过网络发送和接受数据。
A process associates its input or output channel file descriptors (sockets) with a port number and an IP address, a process known as binding, to send and receive data via the network.
当打开一个现有文件或创建一个新文件时，内核向进程返回一个文件描述符。
When we open an existing file or create a new file, the kernel returns a file descriptor to the process.
当打开一个现有文件或创建一个新文件时，内核向进程返回一个文件描述符。
When we open an existing file or create a new file, the kernel returns a file descriptor to the process.
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