On the other hand, as those similarities remain implicit and dispersed, they could add to program complexity.

另一方面，由于这些类似点是隐含的且分散存在的，它们也增加了程序复杂性。

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Many of the projects offer Suggestions on how to go further with that particular design and add to the physical or program capabilities.

许多项目给出了进一步的建议，介绍如何使用某些特殊的设计，以增加新的物理或程序功能。

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Agile development methods, which add program features iteratively, depend on refactoring as a technique to alter and extend a program's design.

敏捷开发方法采用迭代方式增加程序特性，因此需要依赖于重构技术来改变和扩展程序的设计。

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Another change was a spell checker that keeps an eye on every bit of text typed in almost any Firefox browser box be it in a web-based e-mail program or an add-on that lets people post blog updates directly.

BBC: NEWS | Technology | Firefox browser for web 2.0 age

And he also made clear, that the blogger-designated vehicles are an add-on to the ongoing automotive loaner program that all car companies have.

FORBES: So, Why Would Ford Loan Someone Like Me a Car?