使用分离的图层，意味着我能够将所有种类的细节放在他身后。

Being on a separate layer meant I could add all sorts of details behind him.

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我将给出一个例子来证明我的观点，这个例子使用UML编写精准的模型，而没有实现细节。

I will justify my position by giving one example of how UML can be used to write precise models with no implementation detail.

youdao

在我讲述如何构建搜索工具的细节之前，本节介绍贯穿于全文使用的工具。

Before I go into the details of how the search facility is built, this section presents the tools used throughout this article.

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