Each test will serve as a quality feedback loop, creating both a safety net and an executable form of documentation for anyone who wants to change the production code.
每个测试都起到质量反馈回路的作用，给那些想修改产品代码的人创建了一个安全保护网，以及一份可以执行的文档。
The first difference is that it does not normally have a physical manifestation (as indicated in Figure 2), and is simply documentation; in the form of models, for example.
首先最大的不同就是它并不是通常所说的那样有一个物理层面的显示（如图 2所显示的那样），而仅仅是一个文档，例如以模型的模式展示。
Rick Giles's photographs work as a form of social documentation.
里克·贾尔斯的照片作为一种社会工作文件的形式。
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