Since each element in a level of decomposition is considered from the black box perspective only, the only interactions shown are those between them and the systems actors.

由于一个分解级别中的每一个元素都是从黑盒的角度被考虑的，所以显示出来的只是它们同系统参与者之间的交互作用。

youdao

To take a black box perspective means that we ignore the inner workings of the system, and focus only on the interactions with that system.

采用黑盒透视图是指，我们忽略系统的内部工作，仅仅关注同该系统进行的交互作用。

youdao

The domain level focuses strictly on business interactions viewed from the perspective of the external actor.

域层次严格集中在从外部演员的角度看到的业务交互。

youdao

Let me help put into perspective some of the interactions that occur.

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