Often a layer of software on top of the operating system, called middleware, is responsible for implementing this model.

位于操作系统之上的一层软件称作中间件(middleware)，负责实施该模式。

youdao

Often a layer of software on top of the operating system, called middleware, is responsible for implementing this model.

位于操作系统之上的一层软件称作中间件(middleware)，负责实施该模式。

youdao