OV - 4：命令关系图表。

OV-4: Command relationships chart.

youdao

实际上，模式和替换可以是各种各样的内容，并且它们之间不需要像在tr命令中那样具有1：1的关系。

The pattern and replacement can be practically anything, and they don't need to have a 1:1 relationship like they do with the tr command.

youdao

我用SQL SELECT命令建立了master - detail关系，展示了何时使用SQL JOIN更方便。

I built master-detail relations with the result of SQL SELECT commands, showing when it can be more convenient to use SQL JOINs instead.

youdao

He is at war and he is serving under a commander, and so the behavior of these people towards one another is not precisely like what it would be.

他们乐于战斗并服从命令,这种特殊的主从的关系,和我们所想象的完全不同

耶鲁公开课 - 古希腊历史简介课程节选