Boundary classes handle the input and output functions required by a software system.

边界类处理软件系统的输入与输出。

youdao

In fact, it is quite clear that controllers and boundary classes are actually technology classes, not business classes.

实际上，显然控制类和边界类都是面向技术实现的类，而不是面向业务的类。

youdao

Boundary classes mediate the transfer of information and events between the software being executed and the outside world.

边界类在系统与外界之间，为它们交换各种信息与事件。

youdao