Dependency Injection is the way to build large, maintainable applications from small, single-purpose parts.

依赖注入是用小型和单用途部件来构建大型、易维护应用的途径。

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For the purpose of this article, we will assume that you have gone through the previous parts of this series.

考虑到本文的目的，我们假设您已完全了解本系列文章的前几部分。

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The IDL file can do it all and its purpose is just to look at and examine parts of the mapping.

以上要求这一 IDL文件都可以做到，它的目的就是示意并检验部分映射。

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It is time we used past lessons to ensure that we respond today and in the future better than we have in the past with equal parts of both purpose and perspective, with as much focus on maintaining life as usual as in dealing with its cruel disruption.

CNN: In the face of terror, keep calm

Most repair shops and auto parts stores will accept them for this purpose, as will local recycling centers.

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It prompted his successor, John Reid, to declare parts of the system "not fit for purpose" and led to an overhaul of procedures.

BBC: Deportation delays 'costing ?10m'