Visual modeling raises the level of abstraction and makes it easier to communicate specification, architecture, and design.

可视的模型将提高抽象的等级，并使得对规格、架构和设计的通讯变得容易。

youdao

Traceability is the ability to trace artifacts through all levels of abstraction, from specification to implementation and vice versa.

追溯性就是在所有抽象层中跟踪的能力，从规范说明到执行，并且反之亦然。

youdao

All right, so that notion of abstraction and we're going to come back to multiple times -- during the term-- and it's not just abstraction, -- it's the idea of a specification.

现在就试试,这就是抽象的概念,我回过来说，我们将要多次提到这个术语。

麻省理工公开课 - 计算机科学及编程导论课程节选