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Intents add a layer of indirection that enables sophisticated component reuse and substitution.

目的添加了一个间接层来支持复杂组件的重用和替换。

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Anyone can look into the source code, see how it works, tweak it or add to it, and reuse it in other products or services.

任何人都可以查看源代码，可以了解它如何运行，可以调整或者增加代码，也可以在其他产品会服务中来重复使用它。

youdao

Others are more ambitious, requiring new construction or even an extensive rebuilding of city infrastructure consider what is needed to add a second set of pipes for a water-reuse system.

WSJ: How to Build a Greener City