您可以以许多方式使用抽象，例如当您在时序图中使用可视化时一样，作为在代码运行时达到代码之上的层次的方式。

You can use abstraction in several ways, such as when you use visualization in timing diagrams, as a way to get above the code as it is running.

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最后，甚至那些高层次的产业(按时序排在产业链最远一端的那些行业)也会发现他们的底部，然后重新开始雇佣工人。

Finally, even the higher-order industries - the ones furthest up the chain of production in a chronological sense - would find their bottom, and they would begin hiring workers on net.

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本论文实现了全定制电路设计的单元级时序分析，充分体现了层次化的分析思想。

In the thesis, we implemented a cell-based timing analysis of a full-custom design, which shows the idea of hierarchical analysis.

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