修改金山词霸关于shell的翻译

shell
命令解释程序
A software interface between a user and the operating system of a computer. It interprets commands and user interactions on devices such as keyboards, pointing  devices, and touch-sensitive screens etc., and communicate them to the operating system.
用户与计算机操作系统间的一种软件接口。它解释命令及用户在键盘、指点器、触敏屏之类的设备上的交互操作，并将它们传递给操作系统。