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。

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This data wouldn't be viewable by normal file IO operations but could be accessed by any program using a special extended attributes API.

普通文件IO操作将看不到这个数据，但任何程序都可以使用一个特殊的扩展属性api来访问它。

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To help simplify the command-mode cursor movement, when you click Esc at a command prompt, think of your $HISTFILE being loaded as a normal file in vi.

若要帮助简化命令模式下的光标移动，当您在命令提示符处按 Esc 键时，请想象您加载的 $HISTFILE 为 vi 中的普通文件。

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