所有的具体指令——所有的业务逻辑——实现命令接口。

All concrete commands — all business logic — realize the command interface.

youdao

第二种机制在命令行参数输出的指令控制下，把自己标准输入中的行写入日志文件。

It writes lines from its standard input to log files under the control of instructions you enter as command-line arguments.

youdao

可以使用mount(8)命令获得与挂载传播相关的指令。

Using the mount (8) command, you can give directives regarding mount propagation.

youdao