设计了此模式的高层框架，框架中引入了命令总线和命令执行器等组件。

In this framework, imported some components, such as command bus, command executor ect.

youdao

设计了此模式的高层框架，框架中引入了命令总线和命令执行器等组件。

In this framework, imported some components, such as command bus, command executor ect.

youdao