At the highest level of abstraction, we can view the system as a single entity (complex whole), or black box.

在抽象的最高级别上，我们可以将系统视作一个单个实体(复杂整体)，或黑盒。

youdao

At any given level of decomposition, there is a set of logical system elements considered from a black box perspective.

在任何给定的分解层级上，都有一组从黑盒角度考虑的逻辑系统元素。

youdao

The system context documents how the entire system, represented as a black box, interacts with external entities (systems and end users).

系统上下文对表示为黑盒的整个系统如何与外部实体(系统和最终用户)交互做文档说明。

youdao

The NeXT computer was a very cool looking black square box, and it had a brilliant operating system.

FORBES: Personal Thoughts About Steve Jobs

The system involves the installation of a small black box into the driver's car which records how they drive.

BBC: AA to launch sat-nav tech tracked insurance policy